How many scientists does it take to change the light bulb?
Want a crisp cool white light to wake you up in the morning and a warm yellow glow to wind you down at night? How about a spray for your windows that will let sunlight in during the day but illuminate your living room at night?
Scientists at the University of Waterloo are working to actually give consumers these options with a new nanotech light bulb that could revolutionize energy-efficient lighting.



