LED LIGHTING - Myth or fact

LEDs are the most efficient form of lighting - MYTH

Comparison of the Efficacy of a number of different light sources is shown below. The vertical column is in Lumens per Watt. LEDs are not much more efficient than energy saving lamps (CFLs). Fluorescent lamps with electronic ballasts are more efficient.

LEDs are good for some application - FACT

LEDs are very good at localised lighting: eg architectural mood lighting, worktop lighting, corridor lighting where the light level is not required to be very bright and a narrow beam is acceptable.

LEDs can be controlled very easily - FACT

LEDs are very easily controlled. They can be dimmed, switched on and off without any deterioration to the life of the devices.

LEDs are very reliable - FACT

LEDs themselves are very reliable. However they require electronics to drive them, and these can reduce their useful life. If many LEDs are used then the solder joints can be another source of failure. High powers LEDs require good thermal management to conduct the heat away. If this is not done properly the failure rate can be high.

One day ALL lighting will use LEDs - MYTH

There are some applications where LEDs will struggle to compete with other forms of lighting and will fall short of the lighting levels required. Eg retail, office, warehouse and production areas with high bay lighting.

Video clip comparing efficacy of incandescent, Compact fluorescent and led light bulbs.