It has the convenience of a nightlight, but requires a tiny fraction of the power. This neat bedside tray, called the Firefly, uses super-energy efficient "electroceramescent" technology, which combines a durable ceramic with phosphorescent particles to produce a soft blue glow. Even if left on 24/7, the particles will give off light for at least a decade (the company's been running one for 12 years now). No more fumbling in the dark for your glasses.
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