Sunday, 27 March 2011

Diagrams of MR16 LED Spotlights

MR16 spotlights have been often used in spotlighting applications. Traditional MR16 spotlights are halogen lamps. Usually, under current light efficiency of LEDs, 3W LEDs is equivalent to 20W halogen lamps, and 5W or 6W LEDs is equivalent to 40W halogen lamps in terms of lux. Here the picture shows a 4*1W MR16 LED spotlights. See Fg. MR16 LED Spotlights.

From the appearance point of view, MR16 LED spotlights and halogen spotlights look similar. However, in fact, the difference between them is tremendous.

Light Source:light source is the essential difference between LED spotlights & halogen lamps, & that is the reason why LED lights are much more efficient than halogen lamps. halogen lamps generate light by heating tungsten that covered by halogen gas, while for LEDs, basically describing, when current goes through LEDs, compounded particles in P-N junctions will then release photons (energy). LEDs generate less heat when emitting light, that is the reason why LEDs are much more efficient than halogen lamps & incandescent bulbs.

Materials: materials are different, LED spotlights usually require aluminum heatsink for heat dissipation while halogen spotlights do not their lamp bodies are usually made of plastic.

Driver: furthermore, LED spotlights require drivers (or transformers) in order to be running in existing MR16 fittings, normally DC12V low-voltage fittings.

The picture below illustrates a typical MR16 LED spotlight exploded view. The spotlight is decomposed in to 7 parts as can be seen from the diagram. The following are the corresponding annotations.

   1. Lens: beam angle usually customizable

   2. Screws

   3. LEDs

   4. MC PCB

   5. Heatsink

   6. Replacable plug: GU5.3,E26,E27,B22


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