A low energy alterative to incandescent lighting, these bulbs produce up to 5 times the light for the same power, and generally last up to ten times as long. They are normally slightly more bulky than standard incandescent lamp but advancing technology is reducing this handicap rapidly.

They come in 2 basic types. Firstly, those that can be fitted directly into a standard lamp holder as a direct replacement for an incandescent bulb. This type has its own electronics fitted inside the base. Secondly, those that require a special lamp holder, generally 2 or 4 pin, and require separate ballasts to drive the bulb. These versions are more efficient than the integral gear models.

These bulbs have many advantages especially in locations where lights are left on for long periods of time. The options of light they give can be whiter than an incandescent bulb and they render colours more accurately, whilst running at a much cooler temperatures and consuming considerably less electricity.

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