Cree LED has added higher efficiency high colour rendering index versions to its XHP35.2 leds, and introduced leds optimised to dim evenly when used in parallel The company has used its latest ...

Light emitting diodes (LEDs) are popping up in more and more places as companies and individuals try to save money and reduce energy consumption. But some people insist there are problems with them.

Figure 1 This circuit works in most rechargeable batteries. It comprises a reference LED, LED REF, which operates at a constant current of 1 mA and provides reference light of constant intensity ...