LED CFL Replacements
CFL bulbs or compact fluorescent bulbs are a little trickier to replace with LED bulbs because you have to make sure you have the correct base/pin configuration. You also want to make sure you get the color output you want because there may be more than one available. Light bulbs coloring is measured by Kelvin temperature, so you may see a number like 4100K or 41K which means that the bulb is a cool white color. The lower the Kelvin number, the warmer or “pinker” the bulb output color will look, and the higher the number the “whiter” it will look. For example, a 2700K or 27K bulb is considered a warm color, and is usually the fluorescent replacement for the old style incandescent bulbs. This is all a preference, but most people think the whiter the color, the brighter the bulb will be. This is not always the case because you need to look at the lumens. A lumen is a measure of the total “amount” of visible light emitted by a source. Sometimes the cool and warm bulbs will have the same lumens which means they actually give off the same amount of light.
GX23-2 Base Bulbs
A CF13 (13 watt) fluorescent quad lamp with two pins has a GX23-2 base and the bulb looks like this:
G24q-1 Base Bulbs
A CF13 (13 watt) with 4-pins has a G24q-1 base and looks like this:
A CF13 4-pin LED replacement would have a G24q-1 base, and is also available in three different Kelvin colors.
G24q-2 Base Bulbs
A CF18 (18 watt) with 4-pins has a G24q-2 base and looks like this:
This is a nice CF18 4-pin LED replacement, which comes in additional colors as well.
G24q-3 Base Bulbs
A CF26 (26 watt) AND a CF32 (32 watt) with 4-pins both have a G24q-3 base and look like this:
If you have a CF26 or a CF32 bulb and you want an LED replacement, you could go with something like this at Amazon.com. If your application is a recessed can, you might consider going with a vertical style LED replacement in 2700K. This LED replacement is also available in 3500K and 4000K.
If you’re looking for information on replacing LED T8 tubes, check out my LED T8 Tube Replacements page.