4 Key Points in Outdoor Lighting

Outdoor LED lighting lamps and lanterns design should comply with the latest China promulgated outdoor lighting lamps and lanterns technical specifications, as well as the city road lighting design standard.

1,working environment

Because of the working environment of LED outdoor lighting lamps and lanterns is bad, the wind, the rain and sunshine, the sunshine of ultraviolet radiation, the temperature difference changes in the air, dust, chemical gas conditions influence, lamps and lanterns year after year ageing treatment by nature. When designing, should fully consider the impact of these factors.

2, the selection of LED lamps and lanterns materials and cooling mode

Shell and radiator design for an organic whole, used to solve the heating problems LED, this way is better, generally choose aluminum or aluminum alloy, copper or copper alloys, and other alloy with good heat conduction. There are cooling air convection heat, wind cooling heat and heat pipe cooling. (jet cooling heat dissipation is similar to a heat pipe cooling, but more complicated structure)

Choose what kind of cooling mode has a direct influence on the cost of the lamps and lanterns, should be considered comprehensively, and design products choose the best scheme.

The design and the material selection of the chimney is important, now we use transparent organic glass, PC material, etc., traditional chimney is transparent glass products, how to choose the materials of the chimney has something with the design of product class position relevant, generally speaking, the best choice for chimney of outdoor lamps and lanterns is traditional glass products, it is the best choice making the long life and high-grade lamps and lanterns. The transparent plastic, organic glass, etc materials do chimney, it’s better to do the chimney of indoor lamps and lanterns, if used for outdoor, life is limited, because the outdoor sunlight, ultraviolet ray, sand and dust, chemical gases, day and night temperature difference change and other factors make lampshade aging life cut short, the second is the pollution is not easy to settle accounts clean, make lampshade transparency reduced affect light output.

3, LED chips encapsulation

The current domestic production of LED lamps and lanterns (mainly street lamp) are mostly use 1 w LED more series and parallel for assembly, this kind of method thermal resistance advanced packaging technology products is high, not easy to create high quality lamps and lanterns. Or is to use 30 W, 50 W even greater module for assembly, in order to achieve the required power, these LED encapsulation materials useful epoxy resin encapsulation, useful silica gel encapsulated. The difference is: epoxy resin encapsulation heat resistance is poorer. Time is long aging. Silica gel encapsulation is heat resistance is satisfactory, when using, should pay attention to choose.

The author’s view is: the more chips and radiator whole package is better, or use the aluminum plate more chip package again through the phase change material or heat silicone grease and radiator connected, make product thermal resistance than using LED device assembly product thermal resistance is less one or two word thermal resistance, and will be more suitable for heat dissipation. The LED module lamps and lanterns, module base plate is commonly copper base plate, it to the radiator of the connection to use good phase change material, or good heat dissipation silicone grease, guarantee the copper base plate of heat can promptly to the radiator up, such as processing is not easy to make heat accumulation cause module chip is too hot, influence the normal work of the LED chip. The author thinks that: chip packages suitable for manufacturing overall lighting lamps and lanterns. Module encapsulation limited space for the occasion of manufacturing compact led lamps and lanterns (such as car main lighting head lamp, etc.).

4, the design of the radiator

The radiator is one of the crucial parts of led lamps and lanterns, its shape, volume, heat dissipation surface area are designed to address the benefits, radiator is too small, led lamp working temperature is too high, influence the luminous efficiency and life, radiator is too large, the consumable material increase product cost and weight, make the product competition force down. Design the suitable led lamp radiator is very important. Radiator design has the following several parts:

1. Clear needing power for LED lamp cooling.

2. Some parameters when designing radiator: metal heat, the thermal conductivity of metal, chip thermal resistance, thermal resistance, the surrounding environment air thermal resistance, etc.

3. Determine the type of the heat dissipation, (natural convection, wind cooling, heat pipe cooling, and other cooling mode. From the cost comparison: natural convection cost minimum, wind cooling medium, heat pipe cooling cost is higher, jet refrigeration highest cost.

4. Define LED lamps and lanterns licensing the highest working temperature (environment temperature and lamps and lanterns licensing temperature rise)

5. Calculating the volume of the radiator, radiator area. And make sure the shape of the radiator.

6. The radiator and LED lighting sets synthetic complete lamps and lanterns, and energizing work more than eight hours at room temperature, 39 ℃ – and ℃ environment check the temperature of the lamps and lanterns, look to whether meet the cooling requirement, in order to check calculation is correct, such as do not satisfy the conditions of use, should recount and adjusting parameters.

7. The radiator and lamp shade seal to do waterproof, dust proof, chimney and the radiator to pad anti-aging rubber pad or silicone rubber pad, with stainless steel bolts and do seal waterproof, dust proof.

The post 4 Key Points in Outdoor Lighting appeared first on Outdoor Lighting.

4 keys in LED Outdoor Light Design

LED outdoor lighting design should comply with the latest outdoor lighting technical specification,

and the standard of urban road lighting design.

1, Working Enviroment

LED outdoor lighting, due to the working environment is poor. It will directly meet the wind blow,

the rain, the sun. And the sun ultraviolet radiation, the temperature difference between day and

night, dust. The design should fully consider the impact of these factors.

2, Material and Heat Disspation
Shell and heat sink design as a whole, which is used to solve the heat dissipation of LED, this way

is better. Generally choose aluminum or aluminum alloy, copper or copper alloy, and other alloy

thermal conductivity is good. Cooling with air convection cooling, wind cooling, heat pipe cooling.

Choose what kind of operating mode, has a direct impact on the cost of the lighting, should be

overall considered, and choose the best scheme to form a complete set of product.

Chimney design material selection is also crucial. Currently have transparent organic glass, PC

material. Traditional chimney is transparent glass. Choose what kind material of chimney associated

with design products’ positioning. In general, the chimney of outdoor lighting, the best is glass.

It is the best choice for high-grade lighting. Transparent material such as plastic, organic glass,

is good for chimney of indoor lighting. Used for outdoor life is bad. Outdoor sunlight, ultraviolet

rays, dust, chemical gas chimney aging, the change in the temperature difference between day and

night. All these factors will shorten service life. The contamination is not easy to clean, reduce

chimney transparency, and affect the light output.

3, LED Chip Package
Current LED outdoor lighting (mainly street light) is using 1 w high power LEDs in series, in

parallel to assemble. This method is of high thermal resistance is relatively advanced packaging

technology products, it is not easy to make high quality lamps and lanterns. Or it is 30 W, 50 W and

even larger modules assembled, in order to achieve the required power. These LED, package material

useful epoxy resin, use silica gel. The difference between them: Epoxy resin heat resistance isWatch Full Movie Online Streaming Online and Download

poorer. Silica gel is good heat resistance.
Adopt the overall packaging chip and heat sink is a good choice. Or the aluminum substrate multichip

packaging, again through the phase change materials or heat dissipation silicon grease and radiator

connected. Make product heat resistance one to two way more conducive to heat dissipation than with

the LED device assembly product. Use LED module’s lighting, module substrate generally is copper

base plate. Its connection with outer radiator,  use good heat dissipation silicon grease, can

guarantee the copper substrate heat outside in a timely manner to the radiator. If the processing is

not good, easy to make heat accumulation caused by module chip temperature rise too high. Multi-chip

packaging suitable for general lighting, module packaging for compact space limited LED light.

4, Heat Sink Design
Heat sink is one of the key component. Its shape, volume, heat dissipation surface area should be

designed to the point. If heat sink is too small, the LED working temperature is too high, affecting

the luminous efficiency and life span. If heat sink is too big, consumption materials more to

increase the product cost and weight, make the product competitive power. Heat sink design should

take follows into consideration.
1) Definite the nessary heat dissipation rate of LEDs.
2) Design the heat sink with some parameters: metal specific heat, coefficient of thermal

conductivity of metal, the chip thermal resistance, heat sink thermal resistance and ambient air

thermal resistance, etc.
3) Determine the type of heat dissipation, natural convection cooling, wind cooling, heat pipe

cooling, and other way of heat dissipation.) From a cost comparison: natural convection is the

lowest cost, strong breeze cooling medium, the heat pipe radiator construction cost is higher, the

jet cooling cost is the highest.
4) Determine the LED lighting highest working temperature.
5) Calculate the volume of the heat sink, heat dissipation area. And to determine the shape of the

heat sink.
6) Make complete lighting, work eight hours, at room temperature is 39 ℃ to 40 ℃ . Test it whether

meet the cooling requirements. If test calculation is not correct, cannot meet the conditions of

use, have to recalculate and adjust the parameters.
7) Heat sink and lamp chimney seal to be waterproof, dust proof. Fill anti-aging rubber or silicone

rubber mats between lamp chimney and heat sink, with stainless steel bolts, to be sealed waterproof,

dust proof.

The post 4 keys in LED Outdoor Light Design appeared first on Outdoor Lighting.

City Square Nightscape Lighting Application

City Square is various areas and different styles. Design the square’s landscape lighting must seize the inherent characteristics of square, full play square’s function.

City Square landscape lighting, must first coordinate structure’s lighting around square with the lighting inside. And then, unifrom city square  avenue’s lighting. Unify the inherent culture.

City square landscape lighting mainly includes: Fountains, square ground, statue, sidewalk, underground shopping mall, subway exit light, surrounding green space, garden, etc.

Square landscape Lighting

The post City Square Nightscape Lighting Application appeared first on Outdoor Lighting.

Idea of Architecture Lighting

Architecture lighting application is used lighting to creative the image of buildings according to the structure by playing the role of beautification, identifying. Generally includes floodlighting, outline lighting, back lighting, dynamic lighting, etc.

Flood lighting is used floodlights to directly illuminate the building by a certain angle. Reshape the structure image in the night. The effect can not only show the outline of the building, but also make the structure modelling, stereo feeling, building material feeling. And decorative detail processing, can be showed effectively. Flood lighting is not simply to reproduce the structure of the image during the day, but takes advantage of the illumination light, color, shade to reshape the building at night more charming, handsome and majestic image.

Outline lighting is using the LED dot light every 30-50cm continuously to make a light line, or the LED liner light, or LED strip light to outline the building. With a narrow beam angle LED project light spot the building edge can also play the role of outline.

Back light is used indoor light or in a special position lamps transmitted light from inside the building to outward, forming exquisite illumination effect.

Dynamic lighting is based on light to join with control system, upgrade sensual feelings.

Architecture Lighting Applicationbasic requirements:

1, Prominent theme, sharp features, emphasize building image.

2, Highlight the key point, at the same time ensures the general effect, assurance lighting coordinated with around environment.

3, Lighting technical and artistic combination.

4, Comply with the relevant planning and specification requirements;

5, Suitable color light;

6, Choose reasonable way of lighting floodlighting, outline lighting, back lighting, dynamic lighting).

7, Energy saving;

8, Avoiding glare or light interference to inside the buildings and watcher.

9, Control system design should be flexible;

10, Lighting facilities should be safe and reliable, easy to maintenance.

architeture light

The post Idea of Architecture Lighting Application appeared first on Outdoor Lighting.