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I would like to know what compact fluorescent bulbs exactly are and if you need to change anything in a normal fluorescent fixture to get them.

Hi,
Compact flourscent bulbs come in various sizes and shapes.
The standard flourscent is a long tube with one or two
electrical connections called "pins" at each end. They come
in all sorts of lengths, and several different diameters
ranging from 5/8 inch to an inch and a half.

By changing the shape of the standard tube you are able to
"compress" the amount of light given off into a smaller
area. For instance, you can get flourscent tubes that will
screw into the socket for an incandescent bulb in a small
aquarium hood and double or even tripple the light in the
tank. Compact flourscent bulbs are generally horseshoe,
or "U" shaped lights with electrical connections (pins) at
one end. The pins come in two different configurations.
Either four pins in a straight line, or four pins in a
square configuration. It takes a special socket for these
bulbs and they usually require a cooling fan as well.

If you have a standard hood, and want increased light,
you might consider getting a bulb that is rated as
SUNLIGHT, or DAYLIGHT rather than a "grow" type of bulb.
Do not purchase a "Warm" bulb (labeled warm white, etc.)
The "Warm" series are designed for reading, while the
DAYLIGHT or SUNLIGHT include the "glare" of direct sunlight
and are rated at about 6700K temperature.. Perfect for
plants.

Hope that helps...
Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

Great info, Frank
Kudo's