What does CFL stand for?
CFL stands for Compact Fluorescent Lamp, a small fluorescent light bulb that uses 75% less energy than a traditional incandescent bulb and can be screwed into a regular light socket. Don't let the fact that it is fluorescent turn you off! ENERGY STAR qualified CFLs must pass extensive testing to ensure they produce only the highest quality light.
Why should people use CFLs?
Switching from traditional light bulbs to CFLs is an effective, accessible change anyone can make right now to reduce energy use at your business or at home. Lighting accounts for close to 20 percent of the average home's electric bill. Changing to CFLs costs little upfront and provides a quick return on your investment. Using CFLs is also a way to prevent the greenhouse gas emissions that contribute to global climate change.
If every home in America replaced just one incandescent light bulb with an ENERGY STAR qualified CFL, it would save enough energy to light more than 3 million homes and prevent greenhouse gas emissions equivalent to those of more than 800,000 cars annually.
What is the difference between the coil design and the CFLs that resemble a traditional lightbulb?
There are a handful of differences between the coil or "spiral" CFLs and the CFLs that resemble a traditional lightbulb (A-line shape). The first difference is the amount of light each will produce. Most times, a CFL that looks like an incandescent light bulb is really the "coil" shaped CFL with a plastic or glass cover.
This cover will slightly reduce the amount of light that is produced. If you compared a 14W bare spiral CFL and a 14W "incandescent" shaped CFL, the bare product will provide more light for the same wattage. Also, bare CFLs usually have longer lifetimes than covered products.
Second, most bare spiral CFL products will perform like incandescent light bulbs - they will turn on instantly and provide full brightness. Covered CFLs may take slightly longer to reach full brightness.
The last difference is the price - covered CFLs generally cost slightly more than bare spiral because of the additional materials required to manufacture the products.
What are "long life" bulbs?
While a "long life" bulb does last longer than a standard incandescent bulb, it still uses a lot of energy and it doesn't last as long as a Compact Fluorescent Light (CFL). A long life 60-watt incandescent bulb usually lasts for 2,000 hours, but an equivalent 13-watt CFL will last 6,000 hours or more, and use 75% less energy. CFLs help you save money in utility costs and you won't have to buy and change bulbs as often.
What are some common CFL bulb wattages and lumen ratings?
Compact fluorescent bulb wattage ranges from 11 to 42 watts. They use 75% less energy than the equivalent incandescent bulbs, which range between 40 and 150 watts. Some of the most common CFL wattage equivalents are 13 watt CFL (equivalent to 60 watt incandescent) and 23 watt CFL (equivalent to 100 watt incandescent).
At the same time, compact fluorescent lumens fall into the same range as their incandescent equivalents, between about 490 to 2,600 lumens. A 13 watt CFL bulb provides approximately 900 lumens. That means you can get the same amount of light while using much less energy.
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