
With the risk of turning them redundant, innovative lighting systems seem to offer more energy-efficient ways to light up your space. New on the block is the Planilum Light Emitting Glass. These bulbs consist of 4 layers of special glass, a rare gas and serigraphed phosphors, and they're rated for an unbelievable 50,000 hours of use. 20 glorious years! The bulbs' temperature stays close to what a human body's temp stays, making them safe to touch when on. They emit a soft, warm glow, but are currently not available commercial but seem to have a bright future!
Source