Blue light apparently suppresses the production ... who keep peeping while they should be sleeping. The benefits of LED lighting are huge, however. From an energy-efficiency standpoint, there ...

For decades, LEDs have been used as indicator lights on myriad products ... they produce white light. Another method uses a blue LED and yellow or red phosphors. THIS DEFINITION IS FOR PERSONAL ...

These are a blue LED with yellow phosphors ... and around seven times the cost of compact fluorescent lamps, based on normalized light output), when averaged out over the lifetime of the product ...