LED lighting has been something of a revolution in the electrical industry. Not long ago, households and industries were paying huge amounts of money for their lighting, in terms of power and the costs associated with replacing lamps. The original type of lamp popular worldwide until about 10 years ago was the incandescent lamp, which was cheap, easy to break and not particularly long
lasting, but its biggest problem was the amount of energy it consumed in its (relatively) short life. Fluorescent lighting was also being used in industrial and commercial environments but shunned on the whole for domestic use because of the colour of light it produced.
In these days of energy efficiency and the desire to reduce our energy consumption globally the race has been on to develop increasingly efficient lamps and CFLs and LED lamps have been born from this. CFLs are advanced versions of fluorescent lamps and they are much more energy efficient than the old incandescent type, far longer lasting, lower in their energy requirements and a more pleasant colour of light, amber rather than blue so they have proved to be immensely popular.
But the real stars of the show are LED lamps which give off no heat, are highly energy efficient and last even longer than CFLs. They were initially quite expensive costing five times as much as the equivalent CFL but the prices are dropping as more and more designs are produced in larger quantities.
LED lamps are made in clusters as they were originally only used as single instrument and control panel indicator lights, then they started to become popular as Christmas lights and then started to appear in white having only previously been seen in colours like red and green, then orange and blue. The white ones were immediately seen for their potential as true lighting units and soon appeared in cluster form for torches and then were clustered together in larger quantities of over a hundred, giving a much brighter light and a more durable enclosure. This meant they would be suitable for all manner of lighting applications including household, commercial, military and industrial applications.
Many large companies and organisations are reporting massive savings in energy costs after changing to LED lighting. As most of the light they emit is directional so they were initially only used for directional lighting but within a few years designs were coming out that used LED clusters combined with diffuser lenses and cleverly designed back reflectors. Because they lasted for an average of ten times as long as CFL equivalents, they were soon recognized as the most efficient form of lighting available.