Halogen bi-pin and J bulbs can burst, and therefore, should be used in a fully enclosed fixture to provide shielding.Keep combustible materials away from the bulb and avoid touching while in use. The bulbs must be protected by a glass cover in the fixture to prevent potential damage from bulb rupture. do not touch J-type bulbs with bare hands because high temperatures may crack the quartz bulb if it has been etched with oils from hands and fingers. Because of their high operating temperatures and unique bases, thermal control and socket design within the fixture are important. They may be double or single ended and are available in a variety of lengths and wattage. Tube-shaped halogen bulbs (J-type) are made of quartz glass to withstand high operating temperatures. Most halogen bulbs use about one-quarter less energy than the standard incandescent, but recently some halogen lamps have entered the market that use half the energy of standard incandescents. Halogen infrared (IR) bulbs also have a reflective coating to redirect infrared energy back onto the filament to save energy. Halogen bulbs have an inner capsule that contains halogen gas, which extends bulb life. Halogen screw base bulbs fit into the same medium-based sockets as common incandescent bulbs. Halogen bi-pin bulbs only fit into fixtures designed exclusively for their use. Some halogen bulbs have a pin base (bi-pin). Restrict their use to applications where short hours of use are expected, or where there are no other alternatives. However, halogen bulbs offer significantly lower efficacy and shorter life than fluorescent and LED bulbs. If you have a fluorescent light fixture hanging on the underside of a kitchen cabinet over a sink or counter, it should be easy to replace the fixture with a more contemporary set of halogen accent lights.Due to the addition of halogen gas and in some products a coating that reflects infrared energy, halogen incandescent bulbs are somewhat more efficacious (the amount of light produced per unit of input power) than common incandescent bulbs. Once the transformer is connected it should be easy to hang the tracks, bars or wires that will support and power the new halogen lights. Medallions, which are available where lighting products are sold, are thin plates that can be put in place and painted to blend with the surrounding ceiling. If the transformer is smaller than the base of the old light fixture, you may need a ceiling medallion to cover ceiling imperfections that show around the edges of the transformer. The new light fixture probably will come with a metal bar or something similar to help you hang it securely from the electrical box. Basically what you'll be doing is connecting the transformer for the new halogen light to the power supply from the old light. Read the instructions that come with your new light fixture carefully. Inside the ceiling you'll see an open metal or plastic electrical box that contains the wires to connect the new light fixture you've purchased to the wall switch. You may also have to loosen a green screw to release the old fixture's ground wire. Untwist the wires, pull them apart and set the old fixture aside. Using the circuit tester according to directions that come with the device, double check to be sure the power is off. Pull the base down from the ceiling to expose the two wires connecting the fixture to the power supply. Remove them carefully so the base doesn't drop when they're completely loosened. Underneath the bulbs you should see a pair of screws holding the base of the fixture to the ceiling. Take off the cover and remove the light bulbs. Loosen the finger screws or other devices that hold the cover in place on the old light fixture. This is done by going to your home's main service panel and turning off the circuit breaker to that room or by removing the appropriate fuse. Start the job by cutting the power to the fixture you're changing. Circuit testers are available wherever electrical tools are sold, and a simple one usually costs less than $5. You'll need a screwdriver, a circuit tester and a sturdy step ladder or ladder stool.
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