View on IPPINKA: http://www.ippinka.com/blog/electricity-free-luminous-bulb/
Stashed in: Ecology!, Light, Innovation
I'm still figuring out what "electricity free" means. Wow.
Teenager invents a flashlight powered by the heat from your hand : TreeHugger
Dance of Light
Google's Secret to Attracting the Best Talent in the World
Real Rock Band: Play piano like a pro with light keys - New Scientist