Experts flip switch on LED light bulbs
Consumer Reports. Dimming was about as high-tech as they got. But some LEDs have the potential to be much more, thanks to semiconductor chips and electronic circuitry. Some can alter the color of the light they shine, and others claim to help adjust your energy levels and mood. Consumer Reports put their unique claims through some tests, checked with sleep and lighting experts, and looked at how good they are as standard bulbs.