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Light emitting diodes operate at low voltage DC, therefore LED ljusskyltar  light bulbs in household use need to include internal circuits to operate from AC. Another significant condition is obviously a decent light output of the LEDs. Although, the light emitted by a single LED is increasing very fast due to the large amount of research done in the field, most LED light bulbs contain multiple diodes, to increase light emission. LED light bulbs used as a main source of lighting in households started with the introduction of SMD technology to LED ljusskyltar  lighting solutions, and was followed by high power LEDs. These are very bright LEDs, but they are difficult to place into the small space provided by the traditional light bulb.

Breakthrough products in household use were Osram's replacement for a 40W conventional light in 2009, and Philips' replacement of a 50W bulb in May 2010. The light bulbs created with this high light output are full replacements of previous light bulbs of filament types, with similar beam angles. At the same time, hundreds of Chinese manufacturers work on developing new LED ljusskyltar  products at a price much more available to the masses. These solutions might lack brandings that are a guarantee for quality, but might produce quality products with warranty also provided.

Another issue was heat generated by the LEDs. LEDs are heat sensitive devices, therefore their thermal management is crucial. When placed close to each other - especially with high power LEDs, which generate more heat - LEDs ljusskyltar  can easily overheat each other, which eventually leads to the failing of the device. The easiest way of avoiding the overheating of LEDs was that they were uncovered, although this meant that they were also unprotected, and this could also shorten their lifespan due to the dust or oil depositing on the LED's ljusskyltar  surface. The best solution was the introduction of heat sinks with cooling fins into the design of the bulb itself. This provides a proper air circulation and eventually releases much of the heat generated by the LEDs.