Tuesday, 23 April 2013

Week 16

Progress:

RESULT AND ANALYSIS

4.1 Characteristics of the LED lamp


LED lamps are used for both general and special purpose lighting. Where colored light is needed, LEDs naturally emitting many colors are available without filters. This improves the energy efficiently over a white light source that generates all colors of light then discards some of the visible energy in a filter.

White-light LED lamps have longer life expectancy and higher efficiency than most other lighting. LED sources are compact, which gives flexibility in designing lighting fixtures and good control over the distribution of light with small reflectors or lenses. Because of the small size of LEDS, control of the spatial distribution of illumination is extremely flexible and the light output and spatial distribution of a LED array can be controlled with no efficiency loss.
LED lamps have no glass tubes to break and their internal parts are rigidly supported, making them resistant to vibration and impact. With proper driver electronics design, an LED lamp can be made dimmable over a wide range, there is no minimum current needed to sustain lamp operation.


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