Why are incandescent bulbs being phased out? In short, because they waste energy.Consumer Reports' latest light bulb tests found that many of the problems of earlier versions of replacement bulbs have been overcome. But there are some pros and cons to each.
Pros: They're inexpensive and instantly emit a warm light in all directions, accurately revealing the colors of objects and skin tones.
Cons: They use much more electricity than energy-saving bulbs. Most last only about 1,000 hours.
•Compact fluorescent light bulbs (CFLs).
Pros: They use about 75 percent less energy and last 7 to 10 times longer than the incandescent bulbs they replace. Typically, it takes less than a year to recoup the cost of most CFLs. The spirals and covered spirals give off light in all directions, making them a good choice for lamps, and the flood/reflector bulbs are more directional. Several CFL brands offer bulbs with a plastic coating that contains the mercury and any shards if the bulb breaks.
Cons: They take time to fully brighten, typically from 19 seconds for spiral bulbs to several minutes or more for flood/reflector bulbs, especially when used outdoors in cold temperatures. Most CFLs aren't dimmable, and since frequently turning them on and off affects the bulbs' performance and life, they shouldn't be used in certain sockets. CFLs contain mercury, and while the amount is small and has decreased substantially in the bulbs Consumer Reports tested, they should be recycled.
Pros: Halogens are incandescent bulbs that use about 25 to 30 percent less energy than standard incandescents. The halogen bulbs meet the new energy-efficiency standards required by federal law and will not be phased out with standard incandescent bulbs. Halogen bulbs instantly produce light and are fully dimmable. The A-type bulbs cast light in all directions and accurately reveal the color of furnishings.
Cons: Some do not last much longer than standard incandescent bulbs, yet they cost more.
•Light-emitting diode bulbs (LEDs).
Pros: They use slightly less energy than CFLs and manufacturers claim LEDs last 20,000 to 50,000 hours. That's about 18 to 46 years when used three hours a day. LEDs instantly brighten, even in frigid temperatures.
Cons: Among A-type bulbs, the type used for lamps and other applications, not all LEDs are good at emitting light in all directions. The shapes are unusual and the bulbs are heavier. And LEDs can be expensive.