The Goods: November 2013’s Hottest Gadgets

Using only 12 watts, NanoLeaf produces 1,600 lumens, making it the most efficient LED lightbulb. Printed circuit boards provide both the bulb's circuitry and structure. And because the 33 LEDs draw so little energy, they also produce little heat, eliminating the need for a heat sink, so the bulb is lighter. $45 Brian Klutch

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