Litroenergy is a cool new tech that could save billions in energy costs and possibly provide adequate lighting to areas in poverty stricken countries that don't have electricity. According to their web site:

Litroenergy^TM surpasses all known available lighting options for cost/durability/reliability and safety. The uses are unlimited as the imagination; however we predict the safety aspects to be the front runner in application (light safety tape, lighted life rafts/flotation equipment, light safety markings/equipment, etc.). Supplemental light source will be second as the material is bright and one can read by it, if you have some Litroenergy lighting you will not need to always turn on a light source that requires electricity.

The non-toxic inexpensive paint-on or injection mould light source apparently lasts for 15 years, but all I can think about is how cool a Tron costume I could make with it.