A New Use for LEDs: Mind Control

"Fred Maxik wants to make a light bulb that will help you sleep.

“Biological specific lights,” tuned so as not to interfere with an individual’s normal production of melatonin, the hormone secreted from the pineal gland linked to sleepiness, could begin to hit the market in about two years, according to Mr. Maxik, a founder of theLighting Science Group, which specializes in LED bulbs.

With a biological bulb, you could read at night without experiencing the nagging irritability that can occur after using a computer or sitting close to a lamp near bedtime.

And other bulbs — or the same bulb programmed via a network— could help make consumers feel more refreshed in the morning by choreographing their wake-up ritual. “We could even do things like lights for sterilization, with photo catalysts” for bathrooms in perhaps five to six years, he added.

While solid state lights and LED bulbs have been promoted as a tools for energy conservation, industry experts and executives suggest that efficiency will become a Trojan horse for a host of unexpected and arguably more valuable applications. Light-emitting diodes, after all, are semiconductors that can be programmed to emit light at precise wavelengths, colors and tones. Traditional light bulbs, the last vestige of the vacuum tube era, produce light with hot gases or wires."

http://green.blogs.nytimes.com/2011/10/07/a-new-use-for-leds-mind-control/?_r=1