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Could I have an application form? preteens in a pack nl central LEDs, or light emitting diodes, have found out a plum spot in the lighting market in recent years. They use just 25 percent of the energy that an incandescent bulb requires and last about 25 times longer. LEDs illuminate households, make street lamps glow, backlight smartphone screens, and ring in the New Year on the ball dropped in Times Square. They have, in short, come light years from the unappealing red spots that first blinked onto the market in the 1960s.

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