General benefits of high quality LED street lights
Below listed benefits of LED street lighting are related only to latest, high quality LED street lights:
1. Less energy consumption :
LED street lights use 40-80% less electricity and have at least 5 times the life expectancy than regular High Pressure Sodium (HPS) fixtures. LED lamps are 7 times more energy efficient than incandescent and twice as efficient as fluorescent lamps.
2. Higher efficiency and low light pollution due to directional light
LED street lights with a lower lumen output can replace conventional lamps with a higher output. For example, a 30W waterproof LED street light can often replace an 80W High Pressure Sodium lamp. The reason for this is directionality. LED street lighting fixtures are very directional and the light output is much more even then by other street led lamps. Also there is little or no hot spot under the LED lamp. The light emitted from the LED lamp is directed downwards, spread throughout the entire area it covers. This means that a lower amount of light is needed to properly illuminate the area. This also dramatically reduces light pollution, which affects the mood of human beings, navigation in birds and insects, mating behavior in animals and flowering in plants.
3. Long life – up to 100.000 hours
LED street lights last much longer than conventional lamps (3 to 8 times longer). This results in less expense in replacing the lights themselves but also the labor to replace the lamp is needed less often. This provides a great cost savings by itself.
Also the loss of brightness or lumen depreciation is slower over the life of an LED lamp than that of a sodium or other lamp. So not only does the LED have a longer life span than the conventional lamp, but it stays brighter longer than other lamps. The long life span reduces maintenance expenses and makes these bulbs particularly suitable for difficult to reach locations and for street lights where maintenance costs can be significant.
4. Great operating characteristics
LED operate at lower temperatures, are not sensitive to low temperature and unaffected by on off cycling. This makes them safer, more efficient in cold environments (outdoor lights, refrigerator lights and cold room lights) and better for applications requiring frequent switching on and off lights. These bulbs are shocks and vibrations resistant making them the best choice for places like bridges.
5. Reducing carbon footprint
The carbon footprint of LED street lights is smaller than other lights due to lower energy usage. Moreover LEDs last 4 to 10 times longer than any other bulbs, further reducing the carbon footprint of manufacture over the life time.
6. Darksky friendly
Because of the directional light, light is carefully distributed exactly where it is meant to go and therefore there is no or little light which is wasted by illuminating the night sky. This is a considerable plus especially if the local community has a Darksky Initiative.
7. Natural light specter – Color Rendering Index
LED street lamps with color temperature 3.500-4.200 K are rendering more natural light than the yellow of sodium lamps or green of fluorescent street lamps. Also no UV or IR radiation is emitted from the LED street lamps. Color rendering index (CRI) is high (80-90) and displays natural colors of illuminated objects.
8. Free of harmful substances and lower environmental impact when used up
LED luminaires contain no harmful substances, like mercury, lead or other hazardous chemical and gasses. Spent LED lamps can be thrown away without any special handling or disposal requirement,since they are recyclable and environmentally friendly. Other light often have hazardous materials such as lead and mercury which require special handling and waste management procedures which have both economic and environmental costs.
9. Easily controllable
The light is easily controllable with intelligent systems. The light can be turned on and off instantly and can be dimmed for added energy savings at dawn, dusk, and also during hours of low traffic. Switching on-off and dimming does not affect the life-time of the luminaire as in the case of CFL lights.