Led Bulbs Lighting Up Our Lives
Although LED lights (mostly in the form of individual diodes) have been part of our daily life for a long time, their use for lighting purposes started only decades later. This was due to their low light output and to other conditions provided only by later technical inventions.
So what are the conditions that make it possible to have LED light bulbs, which operate at mains and emit enough light to replace any of our current light bulbs?
Light emitting diodes operate at low voltage DC, therefore LED 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 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 Osrams 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 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 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 LEDs surface. The best solution was the introduction of heat China 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.
LEDs come in standard fittings for the sake of easy replacement, however not all LEDs run at the mains, 12V LED lights are still available for running them on batteries or transformers. Transformers need to be LED compatible, as the electronic transformers most frequently used with halogen lights ruin LEDs. There is no such problem with LED bulbs which are suitable for 220V or mains in other words. So those, who wish to reduce their cost of lighting quickly, this is the solution they were looking for.
Anita Samuelis works at LEDcentre.uk.com, a company that offers a wide range of low and main voltage, eco-friendly, energy efficient and cool running LED lights, like LED GU10, LED MR11, LED MR16, G4 LEDs and B22/E27 light bulbs and flexible water proof LED strip lights ideal for homes, offices, shops, boats or caravans. For more information visit their site at http://www.ledcentre.uk.com
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