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Often viewed as being at the forefront of modern energy efficient lighting, it may come as a surprise to learn that the LED has a history stretching right back to the early 1960s. In October 1962, a scientist working for the General Electric Company, Nick Holonyak Jr demonstrated the first Light Emitting Diode (LED) capable of producing visible light. Prior to this, LED light bulbs could only emit invisible infra-red light similar to those used in modern TV remote controls. The new development w …

In the race to produce better quality TVs, it was only a matter of time before manufacturers turned to LED light bulbs. After all, TVs require a light source, and LED light bulbs are cheap to run, last for years and have the added bonus of being environmentally friendly. LCD flat-panel TVs generally use fluorescent lighting. The bulbs lie behind the screen and act as backlights. In effect, they project images from the screen into a room. But in the early 2000s, TV engineers began askin …

The London Underground Tube is getting revamped, complete with LED light bulbs. The new tube of London will be air conditioned, WiFi enabled and have LED lights installed. There will be a strip of LED lights on the doors and inside that will warn passengers when the doors are about to open and close. The underground train will now all be one instead of individual carriages and will have bright LED light strips on the front. LED light bulbs are more energy efficient and last longer than othe …