LED light sources will make it possible to dial the up your preferred color mix. Want to wake up to a reddish tinge? No problem. If the cost trend for LED light sources continues then the days of incandescent and flourescent bulbs are numbered:
By Randall Parker at 2002 October 09 10:11 AM Materials AdvancesThe best white LEDs on the market emit 25 lm/W, which is almost twice as efficient as an equivalent tungsten-filament light bulb, but barely a third as good as a fluorescent tube. To become competitive, the devices need to reach 80 lm/W. To rule the world, 150 lm/W is probably required. If progress continues at the rate of the past 30 years, this will be reached by 2010. That is a big if, but the efficiency of blue and UVLEDs should improve dramatically as better ways are found to build them.
This company offers very interesting RGB controllable LED light sources DMX controlled and all - in different shapes and sizes. There are no price indexed on the web though, but probably the products are not too expensive if you consider other LED products they offer.
Your could look at www.theledlightingcompany
They have colour changing LED products, but they dont have RGB type yet.
just to let you know I have got a RGB LED stripe from my-tronic GmbH (see www.my-led.de) and it works great!