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LEDs have evolved from their start as the tiny indicator lights on devices like coffeemakers to illuminating cellphone screens and billboards in Times Square.
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Why not require guns to be equipped with indicator lights?
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While the driving lights are the first use of a laser beam reflected off a mirror, the daytime running lamps, with their characteristic "torch" effect, and the indicator lights use LEDs.
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To the left of the numbers are indicator lights letting you know whether it's locked or unlocked -- once unlocked, you can pull the metal "u" bar out from just underneath.
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Moreover, it'll dial 911 and alert your relatives should you get in an accident, and perhaps most intriguingly, it'll send full diagnostic reports to your iPhone whenever a warning indicator lights up.
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When you are eating too fast, HAPIfork sends you gentle vibrations and indicator lights so you are aware of when you're not eating at a pace that is optimal for your health.
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While a battery-shaped indicator lights up to show remaining battery capacity, the mile range indicator fluctuates wildly as it constantly projects how far you can go if you continue on your present course.
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There have been several attempts to develop new light-bulbs in recent years - Light Emitting Diodes (LEDs) have come a long way since they were best known for being indicator lights in electronic devices.
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The traction- and stability-indicator lights blink merrily.
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