> Quick answer: To produce a uniform wide beam angle without hotspots in garden paths and yards using solar lamps, injection-molded PMMA or polycarbonate lenses with optimized concave surfaces are most effective [5][9][13][15].
Achieving the perfect lighting for your Romanian garden can be challenging, especially when it comes to choosing the right solar lamp. The key to uniform and wide-angle beam distribution lies in selecting the appropriate optical materials and lens designs. This article will guide you through the best options available on the market.
Optical Materials for Uniform Beam Distribution
The most effective optical materials for achieving a uniform wide beam angle without hotspots are injection-molded polymers, specifically poly(methylmethacrylate) (PMMA) or polycarbonate [13][15]. These materials offer high optical clarity and excellent moldability, making them ideal for solar lamp lenses. PMMA is particularly highlighted for its transparency and ease of fabrication [13].
Lens Design Principles
The design of the lens is crucial in ensuring uniform wide-angle distribution. A punctual Lambertian source emits light in a conical pattern, leading to uneven intensity at the edges [9][12]. To correct this, lenses incorporate concave lodging areas and optimized rear and front portions to maximize total internal reflection and minimize backscatter [9][12].
#### Optimized Rear and Front Portions
The lens’s rear portion is optimized for total internal reflection, redirecting light that would otherwise be lost. The front portion is shaped to transmit light efficiently while minimizing reflection back into the device. This results in a more uniform beam compared to bare LEDs or simple diffusers [9][12].
Symmetrical Wide-Angle Beam Design
Symmetrical wide-angle beams are ideal for garden paths and yards, as they provide even illumination over 180 to 360 degrees [6]. According to patents, one effective design is a dual-lens system where two lenses face each other, their planar faces aligned and spaced at a given distance. This setup enables the generation of a symmetrical beam with precise control over its shape [5].
Comparison Table: Lens Configurations
| Configuration | Pros | Cons |
|–––––––|––––––––––––––-|–––––––|
| Single PMMA lens | High transparency, easy fabrication | Limited customization|
| Dual-lens system | Precise beam control, wide-angle output | More complex design |
Why Refractive Lenses Over Reflective Systems
Refractive lenses made from molded polymers are preferred over reflective systems for their lightweight and thin-profile characteristics. While some patents describe asymmetrical beam generation using reflectors, these designs are bulkier and less suitable for compact solar fixtures [14].
Advantages of Molded Refractive Lenses
Molded refractive lenses offer a simple yet well-optimized solution that is ideal for mass-produced solar garden lights. The use of multiple small project-lenses or refractive optics can achieve wide viewing angles but increases complexity and cost [17][18]. In contrast, a single precisely shaped lens that redistributes light from a point source across a 180–360° arc is the most efficient and uniform option [5][6].
Key Takeaways
- Optimal Materials: Injection-molded PMMA or polycarbonate lenses are best for uniform wide-angle distribution.
- Lens Design: Concave surfaces and optimized front/rear portions maximize total internal reflection and minimize backscatter.
- Dual-Lens System: Effective for precise control over symmetrical beam output.
Frequently Asked Questions
[
{„q”: „What materials are best for solar lamp lenses?”, „a”: „Injection-molded PMMA or polycarbonate lenses are optimal. They offer high transparency and ease of fabrication [13][15].”},
{„q”: „How do lens designs affect beam uniformity?”, „a”: „Lenses with concave surfaces and optimized front/rear portions maximize total internal reflection, leading to more uniform beams [9][12].”},
{„q”: „Why are dual-lens systems effective for garden paths?”, „a”: „Dual-lens systems enable precise control over symmetrical beam output, providing even illumination over wide angles [5][6].”}
]
References
- [5] US20120195040A1_-_Lens_for_asymmetrical_light_beam_generation__1d2f177b — patent
source passage
it may be desired to provide an exit light beam that is symmetrical. – FIG. 7 represents another embodiment of an optical device according to the invention. In this embodiment, twolenses 10 are facing together, theplanar face 17 of afirst lens 10 facing theplanar face 17 of thesecond lens 10. The sagittal plane A of thelenses 10 are merging and saidlenses 10 are positioned at a given distance d. Such construction allows the generation of a symmetrical light beam in such manner that saidlens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. – It should be noted that LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In order to provide an attractive product, the dimensions of the luminary head should remain reasonably low. – One of the advantages of LEDs is miniaturization. In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. The invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. – Usually, lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. Preferably, they are made with a transparent material. This material may be colored or colorless, depending on the desired application. For instance, an appropriate materi
- [6] US20120020060A1_-_Energy-efficient_solar-powered_-_Google_Patents__619c8cff — patent
source passage
light out in patterns extending 180 degrees-360 degrees around the fixture, for example. – the LED fixture comprises heat exchange or other cooling means in order to lower the temperature of the LEDs and the associated equipment. – fixtures may have adjustable-direction LED modules that may be directed to emit light in various directions for fine-tuning to desired light patterns. – an outdoor light pole having the features described above, is provided on, and hinged to, a portable base. – the battery system may be located in, and provide additional weight for, the base. – the solar-powered outdoor lighting system is connected to the utility grid, so that the photovoltaic panel may provide energy to the grid during peak-demand daylight hours, and so that, if needed or desired, low cost night-time electricity may be provided by the grid to the outdoor lighting system, to power the light and/or charge batteries. – batteries or other storage devices are provided that may also be charged during the daylight hours, for providing power to the lighting system during the night hours, and/or providing power to the lighting system in the event of a grid failure or natural catastrophe that interrupts grid power supply. – venting and/or air channels are provided in the pole to allow cooling by natural convection air flow through the pole and the light fixture. – heating equipment may be provided in one or areas of the pole to protect equipment and/or enhance operation during extreme cold.
- [9] US9039252B2_-_Lens_for_asymmetrical_light_beam_-_Google_Patents__72d5e9f9 — patent
source passage
shown on FIGS. 2 to 4 . – a punctual lambertian light source normally leads to a round light beam. – a LED 20 may be approximated as a punctual light source. – FIG. 6 shows the effect of the lens 10 according to FIGS. 2-5 on the conical light beam emitted by a lambertian LED 20 . It appears that the rear portion 18 is optimized in order to maximize total internal reflection and therefore send to the front portion 19 light rays that would otherwise go rearward and the front portion 19 of the profile is optimized to transmit light as much as possible and therefore minimize light rays being bounced back to the rear part 18 . – FIG. 6 shows the polar representation of the light beam at the exit diopter 12 . This representation shows that the light beam is clearly asymmetrical. – FIG. 7 represents another embodiment of an optical device according to the invention. – two lenses 10 are facing together, the planar face 17 of a first lens 10 facing the planar face 17 of the second lens 10 . – the sagittal plane A of the lenses 10 are merging and said lenses 10 are positioned at a given distance d. – Such construction allows the generation of a symmetrical light beam in such manner that said lens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. – LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In
- [12] CA2776733C_-_Lens_for_asymmetrical_light_beam_generation__9bd96491 — patent
source passage
a punctual lambertian light source through an optical device as shown on figures 2 to 4. Such a light source normally leads to a round light beam. A LED 20 may be approximated as a punctual light source. 7 PCT/1B2010/054385 Figure 6 shows the effect of the lens 10 according to Fig. 2-5 on the conical light beam emitted by a lambertian LED 20. It appears that the rear portion 18 is optimized in order to maximize total internal reflection and therefore send to the front portion 19 light rays that would otherwise go rearward and the front portion 19 of the profile is optimized to transmit light as much as possible and therefore minimize light rays being bounced back to the rear part 18. Figure 6 shows the polar representation of the light beam at the exit diopter 12. This representation shows that the light beam is clearly asymmetrical. However, it may be desired to provide an exit light beam that is symmetrical. Figure 7 represents another embodiment of an optical device according to the invention. In this embodiment, two lenses 10 are facing together, the planar face 17 of a first lens 10 facing the planar face 17 of the second lens 10. The sagittal plane A of the lenses 10 are merging and said lenses 10 are positioned at a given distance d. Such construction allows the generation of a symmetrical light beam in such manner that said lens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. It should be noted that
- [13] US20120195040A1_-_Lens_for_asymmetrical_light_beam_generation__1d2f177b — patent
source passage
In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. – the invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. – lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. – they are made with a transparent material. – This material may be colored or colorless, depending on the desired application. – an appropriate material is polymethacrylate, more specifically poly(methylmethacrylate). – Other transparent plastics may be used such as polycarbonates. – Optical devices according to an embodiment of the invention can be used for street luminary for instance. – Such street luminary comprises a luminary head which is provided at the top of a luminary post. – the luminary head comprises a support for a plurality of lighting devices arranged below the support of the luminary head and directed towards the ground. – Each lighting device comprises at least one light emitting diode (LED) upstream, with respect to light propagation, of at least one optical device, such as such as the embodiment of FIGS. 2 to 5 , said optical devices having substantially the same bearing, to generate an asymmetrical light beam. – LED light emitting diode – the luminary head can comprise a plurality of light emitting diodes (LED), at least one LED being arranged upstream of each optical device as described in FIGS. 2 to 5 , said o
- [14] US9039252B2_-_Lens_for_asymmetrical_light_beam_-_Google_Patents__72d5e9f9 — patent
source passage
the lens (10) comprises an entry diopter (11) including at least one concave lodging (13) for lodging at least one light source, the surface of the concave lodging (13) facing at least partly the curved rear portion (18). Description The invention relates to an optical device for generating an asymmetrical light beam. This optical device is particularly relevant for lighting petrol station; nevertheless, this optical device can be extended to any other field of application for indoor or outdoor lighting such as road, area or decorative lighting amongst others. It is known to use reflectors to create asymmetrical beams output from the outdoor luminaries. Various reflector systems have been proposed to provide an asymmetrical beam. Such reflector systems are quite bulky. For street lighting, usual light sources are high intensity discharge lamps like sodium vapor lamps, fluorescent balloons or fluorescent tubes. However, these kinds of sources are quite bulky and they require a frequent and time-consuming maintenance. A consequence of bulkiness is that the luminary heads also are bulky, which may be a drawback under windy conditions. Other luminaries consists in using Light Emitting Diodes (LEDs) as light sources with primary lenses shaped to obtain a determinate and fixed light effect. Such types of primary lenses are disclosed for example in WO2008/122941, EP 1 621 918, US2006/138437, WO98/33007. Led based luminaries are more and more desirable nowadays for both indoor and ou
- [15] US9039252B2_-_Lens_for_asymmetrical_light_beam_-_Google_Patents__72d5e9f9 — patent
source passage
the lens 10 and the middle part of said lens 10. However, it may be desired to provide an exit light beam that is symmetrical. It should be noted that LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In order to provide an attractive product, the dimensions of the luminary head should remain reasonably low. One of the advantages of LEDs is miniaturization. In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. The invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. Usually, lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. Preferably, they are made with a transparent material. This material may be colored or colorless, depending on the desired application. For instance, an appropriate material is polymethacrylate, more specifically poly(methylmethacrylate). Other transparent plastics may be used such as polycarbonates. Optical devices according to an embodiment of the invention can be used for street luminary for instance. Such street luminary comprises a luminary head which is provided at the top of a luminary post. The luminary head comprises a support for a plurality of lighting devices arranged below the support of the luminary head and directed towards the ground. Each
- [17] US10563823B2_-_LED_or-and_laser_bulb_-_Google_Patents__63bb8edf — patent
source passage
single optic-lens ( 503 – 1 ) almost cover the 60 degree of the said frame ( 5 F). So, the wide viewing angle project-image will move se around 60 degree for circle range while the top project-lens-assembly each single project lens takes 60 degree, then the big project image traveling will be around 60 degree. – any (i) different spacing for plurality of small project-lens and (ii) this embodiment is not limited for LED bulb application only it also cover the all LED outdoor light, or LED garden light, or LED seasonal light, or LED projection light, or LED patio light string, LED seasonal string light with AC-plug wire with built-in or outside switch or sensor or control the said color, brightness, selected function, change function, selected hi/low brightness, dimmable switch for desired light function, light performance; still fall within the current invention scope and claim covered. – the said LEDs ( 501 – 1 ) has narrow viewing angle so may have optional optic-lens added like FIG. 5B ( 502 – 2 ) to let the narrow light beam become wider viewing angle light beams or add the distance from the LED top to the image-carries but it will be loose some light brightness. – the said lighted shaped or tiny-image light beam will emit to top single optical-lens ( 503 – 1 ) fixed on the said frame ( 5 F) of the said projection-lens-assembly ( 503 D). – the wider viewing angle the said shaped or tiny-image light beam goes through the said each single optics-lens ( 503 – 1 ) and form th
- [18] US10563823B2_-_LED_or-and_laser_bulb_-_Google_Patents__63bb8edf — patent
source passage
alternative way to create a wider viewing angle or-and super bright project-image on the surface. This embodiment use more than one optic-lens (x5) (x6) has at least one has refractive or-and refractive optics-properties lens to make the LEDs (x4) light beams to pass though the 1st lens (x5) to change the narrow emit-out-angle LEDs light-beam to become many light-beam after go through the said Pt of reflective (x5) or-and refraction (x5) optics-lens (x5) and the said many light-beams emit-to and go-through the outside 2nd project or protective lens/cover (x6) which has big-arc (x6) or big-angle (x6) or flat-piece (not shown) or preferred shape including (i) dome, half ball, or at least 1.2 ball, sphere those has desired optics properties including reflective or-and refractive (x6) or-and diffusing (x15) or-and convex lens (x6) or-and made with plurality of small sections/areas/piece to form a optic-function piece (x15), or a sphere outer-piece (x6) just for protection/environment/waterproof purpose only; or, even (ii) flat-piece (not shown) for just protection purpose to make the more wider viewing angle project-images or-and lighted pattern(s) to shown on outside the LED light, or LED bulb, or LED garden light, or other LED outdoor, or LED indoor lighting device. The said 1st lens (x5) may also has texture which can be a wave type and the LEDs (1) can be more than one of blue-light and green-light or white-light LEDs (x4) with IC or-and controller to make the said LEDs color
it may be desired to provide an exit light beam that is symmetrical. – FIG. 7 represents another embodiment of an optical device according to the invention. In this embodiment, twolenses 10 are facing together, theplanar face 17 of afirst lens 10 facing theplanar face 17 of thesecond lens 10. The sagittal plane A of thelenses 10 are merging and saidlenses 10 are positioned at a given distance d. Such construction allows the generation of a symmetrical light beam in such manner that saidlens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. – It should be noted that LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In order to provide an attractive product, the dimensions of the luminary head should remain reasonably low. – One of the advantages of LEDs is miniaturization. In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. The invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. – Usually, lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. Preferably, they are made with a transparent material. This material may be colored or colorless, depending on the desired application. For instance, an appropriate materi
light out in patterns extending 180 degrees-360 degrees around the fixture, for example. – the LED fixture comprises heat exchange or other cooling means in order to lower the temperature of the LEDs and the associated equipment. – fixtures may have adjustable-direction LED modules that may be directed to emit light in various directions for fine-tuning to desired light patterns. – an outdoor light pole having the features described above, is provided on, and hinged to, a portable base. – the battery system may be located in, and provide additional weight for, the base. – the solar-powered outdoor lighting system is connected to the utility grid, so that the photovoltaic panel may provide energy to the grid during peak-demand daylight hours, and so that, if needed or desired, low cost night-time electricity may be provided by the grid to the outdoor lighting system, to power the light and/or charge batteries. – batteries or other storage devices are provided that may also be charged during the daylight hours, for providing power to the lighting system during the night hours, and/or providing power to the lighting system in the event of a grid failure or natural catastrophe that interrupts grid power supply. – venting and/or air channels are provided in the pole to allow cooling by natural convection air flow through the pole and the light fixture. – heating equipment may be provided in one or areas of the pole to protect equipment and/or enhance operation during extreme cold.
shown on FIGS. 2 to 4 . – a punctual lambertian light source normally leads to a round light beam. – a LED 20 may be approximated as a punctual light source. – FIG. 6 shows the effect of the lens 10 according to FIGS. 2-5 on the conical light beam emitted by a lambertian LED 20 . It appears that the rear portion 18 is optimized in order to maximize total internal reflection and therefore send to the front portion 19 light rays that would otherwise go rearward and the front portion 19 of the profile is optimized to transmit light as much as possible and therefore minimize light rays being bounced back to the rear part 18 . – FIG. 6 shows the polar representation of the light beam at the exit diopter 12 . This representation shows that the light beam is clearly asymmetrical. – FIG. 7 represents another embodiment of an optical device according to the invention. – two lenses 10 are facing together, the planar face 17 of a first lens 10 facing the planar face 17 of the second lens 10 . – the sagittal plane A of the lenses 10 are merging and said lenses 10 are positioned at a given distance d. – Such construction allows the generation of a symmetrical light beam in such manner that said lens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. – LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In
a punctual lambertian light source through an optical device as shown on figures 2 to 4. Such a light source normally leads to a round light beam. A LED 20 may be approximated as a punctual light source. 7 PCT/1B2010/054385 Figure 6 shows the effect of the lens 10 according to Fig. 2-5 on the conical light beam emitted by a lambertian LED 20. It appears that the rear portion 18 is optimized in order to maximize total internal reflection and therefore send to the front portion 19 light rays that would otherwise go rearward and the front portion 19 of the profile is optimized to transmit light as much as possible and therefore minimize light rays being bounced back to the rear part 18. Figure 6 shows the polar representation of the light beam at the exit diopter 12. This representation shows that the light beam is clearly asymmetrical. However, it may be desired to provide an exit light beam that is symmetrical. Figure 7 represents another embodiment of an optical device according to the invention. In this embodiment, two lenses 10 are facing together, the planar face 17 of a first lens 10 facing the planar face 17 of the second lens 10. The sagittal plane A of the lenses 10 are merging and said lenses 10 are positioned at a given distance d. Such construction allows the generation of a symmetrical light beam in such manner that said lens 10 can be used in the conception of luminaries generating a symmetrical light beam either an asymmetrical light beam. It should be noted that
In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. – the invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. – lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. – they are made with a transparent material. – This material may be colored or colorless, depending on the desired application. – an appropriate material is polymethacrylate, more specifically poly(methylmethacrylate). – Other transparent plastics may be used such as polycarbonates. – Optical devices according to an embodiment of the invention can be used for street luminary for instance. – Such street luminary comprises a luminary head which is provided at the top of a luminary post. – the luminary head comprises a support for a plurality of lighting devices arranged below the support of the luminary head and directed towards the ground. – Each lighting device comprises at least one light emitting diode (LED) upstream, with respect to light propagation, of at least one optical device, such as such as the embodiment of FIGS. 2 to 5 , said optical devices having substantially the same bearing, to generate an asymmetrical light beam. – LED light emitting diode – the luminary head can comprise a plurality of light emitting diodes (LED), at least one LED being arranged upstream of each optical device as described in FIGS. 2 to 5 , said o
the lens (10) comprises an entry diopter (11) including at least one concave lodging (13) for lodging at least one light source, the surface of the concave lodging (13) facing at least partly the curved rear portion (18). Description The invention relates to an optical device for generating an asymmetrical light beam. This optical device is particularly relevant for lighting petrol station; nevertheless, this optical device can be extended to any other field of application for indoor or outdoor lighting such as road, area or decorative lighting amongst others. It is known to use reflectors to create asymmetrical beams output from the outdoor luminaries. Various reflector systems have been proposed to provide an asymmetrical beam. Such reflector systems are quite bulky. For street lighting, usual light sources are high intensity discharge lamps like sodium vapor lamps, fluorescent balloons or fluorescent tubes. However, these kinds of sources are quite bulky and they require a frequent and time-consuming maintenance. A consequence of bulkiness is that the luminary heads also are bulky, which may be a drawback under windy conditions. Other luminaries consists in using Light Emitting Diodes (LEDs) as light sources with primary lenses shaped to obtain a determinate and fixed light effect. Such types of primary lenses are disclosed for example in WO2008/122941, EP 1 621 918, US2006/138437, WO98/33007. Led based luminaries are more and more desirable nowadays for both indoor and ou
the lens 10 and the middle part of said lens 10. However, it may be desired to provide an exit light beam that is symmetrical. It should be noted that LEDs are a good alternative to standard light sources used for street lighting. A large number of LEDs may be mounted on each luminary head to provide sufficient lighting. In order to provide an attractive product, the dimensions of the luminary head should remain reasonably low. One of the advantages of LEDs is miniaturization. In outdoor appliances, this allows for reduced thickness of the luminary head with miniaturized optics. The invention proposes optics for LEDs, easy to design and to adapt to a large range of configurations. Usually, lenses 10 according to the invention are manufactured by compression moulding or injection moulding, according to well known techniques. Preferably, they are made with a transparent material. This material may be colored or colorless, depending on the desired application. For instance, an appropriate material is polymethacrylate, more specifically poly(methylmethacrylate). Other transparent plastics may be used such as polycarbonates. Optical devices according to an embodiment of the invention can be used for street luminary for instance. Such street luminary comprises a luminary head which is provided at the top of a luminary post. The luminary head comprises a support for a plurality of lighting devices arranged below the support of the luminary head and directed towards the ground. Each
single optic-lens ( 503 – 1 ) almost cover the 60 degree of the said frame ( 5 F). So, the wide viewing angle project-image will move se around 60 degree for circle range while the top project-lens-assembly each single project lens takes 60 degree, then the big project image traveling will be around 60 degree. – any (i) different spacing for plurality of small project-lens and (ii) this embodiment is not limited for LED bulb application only it also cover the all LED outdoor light, or LED garden light, or LED seasonal light, or LED projection light, or LED patio light string, LED seasonal string light with AC-plug wire with built-in or outside switch or sensor or control the said color, brightness, selected function, change function, selected hi/low brightness, dimmable switch for desired light function, light performance; still fall within the current invention scope and claim covered. – the said LEDs ( 501 – 1 ) has narrow viewing angle so may have optional optic-lens added like FIG. 5B ( 502 – 2 ) to let the narrow light beam become wider viewing angle light beams or add the distance from the LED top to the image-carries but it will be loose some light brightness. – the said lighted shaped or tiny-image light beam will emit to top single optical-lens ( 503 – 1 ) fixed on the said frame ( 5 F) of the said projection-lens-assembly ( 503 D). – the wider viewing angle the said shaped or tiny-image light beam goes through the said each single optics-lens ( 503 – 1 ) and form th
alternative way to create a wider viewing angle or-and super bright project-image on the surface. This embodiment use more than one optic-lens (x5) (x6) has at least one has refractive or-and refractive optics-properties lens to make the LEDs (x4) light beams to pass though the 1st lens (x5) to change the narrow emit-out-angle LEDs light-beam to become many light-beam after go through the said Pt of reflective (x5) or-and refraction (x5) optics-lens (x5) and the said many light-beams emit-to and go-through the outside 2nd project or protective lens/cover (x6) which has big-arc (x6) or big-angle (x6) or flat-piece (not shown) or preferred shape including (i) dome, half ball, or at least 1.2 ball, sphere those has desired optics properties including reflective or-and refractive (x6) or-and diffusing (x15) or-and convex lens (x6) or-and made with plurality of small sections/areas/piece to form a optic-function piece (x15), or a sphere outer-piece (x6) just for protection/environment/waterproof purpose only; or, even (ii) flat-piece (not shown) for just protection purpose to make the more wider viewing angle project-images or-and lighted pattern(s) to shown on outside the LED light, or LED bulb, or LED garden light, or other LED outdoor, or LED indoor lighting device. The said 1st lens (x5) may also has texture which can be a wave type and the LEDs (1) can be more than one of blue-light and green-light or white-light LEDs (x4) with IC or-and controller to make the said LEDs color