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Because the LED casts light in only one direction, the most common way LED lights are designed, even "plain" sets having some sort of crystal pattern to create refraction. Many bargain brands have dome-shaped LEDs which focus the light so that it's sharply visible when viewed head-on, but almost invisible from a perpendicular direction.
One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights. Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.
Manning Close Christmas Light Show, Wells, Somerset, England. Christmas light sculptures, also called motifs, are used as Christmas decorations and for other holidays. Originally, these were large wireframe metalwork pieces made for public displays, such as for a municipal government to place on utility poles, and shopping centers to place on ...
The first LEDs emitted light in a very narrow band of wavelengths, of a color characteristic of the energy band gap of the semiconductor material used to make the LED. LEDs that emit white light are made using two principal methods: either mixing light from multiple LEDs of various colors, or using a phosphor to convert some of the light to ...
From festive markets to light displays, take a look at Christmas in every state. ... Throughout November and December, the city is decorated with a 110-foot-tall LED light tree, while the ...
LED christmas lights. LEDs also have twinkling versions, though they contain an oscillator that alternates on and off at a very regular intervals rather than the irregular blinking of the thermal bimetallic strips. Dimmers or low batteries generally do not affect the twinkling interval, but as with incandescent bulbs, having them off part of ...