White-light sources based on reliable and energy-efficient LEDs have only recently been made possible through developments in semiconductors (Fig. 1 shows a white-light LED in action). It is ...

Learn more› By Megan Wollerton We have finished a new round of testing and will update this guide ... LED continues to be the best smart bulb. It delivered strong lux readings at a variety of ...

So it was good news for me when manufacturers introduced a more cost-effective, environmentally sound lighting option: the LED (light emitting ... absorb heat while the source is lit.