LEDS - What is the quality of white light from LED's?
The quality of a lighting source is judged by its ability to reproduce the appearance of an object as if illuminated by "true" white light. The colour-rendering index (CRI) is an imperfect, but widely used quantitative measure of the ability of the lighting source to accurately render the colour of objects. Natural sunlight and incandescent lamps have CRIs of 100 while fluorescent lamps have CRIs between 50 and 99. Current white LEDs have CRIs around 70-90.
Q: What are the advantages of using LEDs?
A:- Saturated colours without the need to use filters. Directional light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a useable manner.
LEDs are insensitive to vibration and shocks, unlike incandescent and discharge sources.
LEDs are extremely durable. LEDs have an extremely long life.
LEDs are a very efficient light source.
LEDs do not emit Infra-red.
LEDs do not emit Ultra Violet.-
LEDs light up instantly.
Q: What are the lighting applications for LEDs?
A: It is important to evaluate the application before choosing the LED source. As there are many options available with LEDs from low output to high output and RGB options, the application needs to be looked at first.
Once the application has been identified a suitable LED solution will be easier to find.
Currently LEDs are being used in the following illumination applications:
* Effect lighting
* Feature lighting
* Indirect lighting
* General lighting
* Task lighting
* Back illumination
* Street and amenity lighting.