|
Other Lamps, Lighting
A lamp, in technical usage, is a replaceable component such as an incandescent light bulb, which is designed to produce light from electricity. These components usually have a ceramic or metal base, which makes an electrical connection in the socket of a light fixture. more...
 Home
A/V Accessories & Cables
DVD & Home Theater
Gadgets & Other Electronics
Heating, Cooling & Air
Home Audio
Lamps, Lighting, Ceiling...
 Bathroom Lighting
Ceiling Fans
Ceiling Fixtures
Chandeliers
Children's Lighting
Desk Lamps
Exterior, Landscape Lighting
Floor Lamps
Lava Lamps, Party Lights
Lighting Accessories
Multiple Lamp Sets
Neon Signs
Night Lights
Other Lamps, Lighting
Paper Lanterns
Pendant Lighting
Picture Lights
Recessed Lighting
Sconces, Wall Lamps
String Lights
Table Lamps
Track Lighting
Under Cabinet Lighting
Major Appliances
Outdoor Power Equipment
Satellite, Cable TV
Televisions
Vacuum Cleaners &...
This connection may be made with a threaded base, two metal pins, or a "bayonet mount." Re-lamping is the replacement of only the removable lamp in a light fixture.
Types of lamp
Incandescent light bulb
-
The incandescent light bulb was the first type of modern electric light, introduced in the early 19th Century. It is now being banned in some countries because it is inefficient at converting electricity to light. About 90% of the energy input is released as heat. This excess heat is then dumped into the air which, in warm climates, must then be cooled by ventilation or air conditioning, resulting in more energy consumption. However, in northern climates where heating and lighting is required during the cold and dark winter months, this technology can be considered efficient.
Halogen lamps were introduced as an improvement to incandescent bulbs. Visible light output of these lamps is about 15% of the energy input, instead of 10%, allowing them to produce a total of about 50% more light using the same amount of electrical power. The bulb capsule is under high pressure instead of a vacuum or low-pressure noble gas. Good halogen bulbs produce a "cool white" color temperature approaching the appearance of sunlight at noon, while regular incandescent bulbs produce warm light with a warm yellow color temperature.
Halogen lamps are usually much smaller than standard incandescents and burn with a hotter filament temperature, which results in a very hot surface. For this reason, a fused-quartz "capsule" is used to enclose the filament, which is sealed behind an additional layer of glass. This is a safety precaution, because halogen "bulbs" can explode if broken while operating or by coming into contact with water or oily residue from fingerprints. The risk of burns or fire is also greater than other bulbs, leading to their prohibition in some places.
Fluorescent lamp
-
Fluorescent lamps have an efficiency of about 40%, meaning that for the same amount of light generated, they use ΒΌ the power and produce 1/6 the heat of a regular incandescent. Fluorescents were limited to linear and a round "circleline" lamp until the 1980s, when the compact fluorescent lamp (CFL) was invented. CFLs can have a built-in electrical ballast which fit into a standard screw base, or make use of a remote ballast. Compact and linear fluorescent lamps last far longer than incandescents, but do have some starting trouble in very cold weather when installed outside.
Read more at Wikipedia.org
|
|
