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Wikipedia about light bulbs

Merge: date=March 2008 For: Light fixture

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Incandescent light bulb

main: Incandescent light bulb Incandescent light bulb as we know it today, with a coiled filament of tungsten, was commercialised in the 1920s. It is sometimes confused with the carbon filament lamp introduced in about 1880. As well as bulbs for normal illumination, there is a very wide range, including low voltage, low-power types often used as components in equipment, but now largely displaced by LEDs

There is currently interest in banning some types of filament lamp in some countries, such as Australia planning to ban standard incandescent light bulbs by 2010, because they are inefficient at converting electricity to light. Less than 3% of the input energy is converted into usable light. Nearly all of the input energy ends up as heat that, in warm climates, must then be removed from the building by ventilation or air conditioning, often resulting in more energy consumption. In colder climates where heating and lighting is required during the cold and dark winter months, the heat byproduct has at least some value.

Halogen lamp

main: Halogen lamp

Halogen lamps are usually much smaller than standard incandescents, because for successful operation a bulb temperature over 200°C is generally necessary. For this reason, most have a bulb of fused silica (quartz), but sometimes aluminosilicate glass. This is often sealed inside an additional layer of glass. The outer glass is a safety precaution, reducing UV emission and because halogen bulbs can occasionally explode during operation. One reason is if the quartz bulb has oily residue from fingerprints. The risk of burns or fire is also greater with bare bulbs, leading to their prohibition in some places unless enclosed by the luminaire. Those designed for 12V or 24V operation have compact filaments, useful for good optical control, also they have higher efficacies (lumens per watt) and better lives than non halogen types. The light output remains almost constant throughout life.

Fluorescent lamp

main: Fluorescent lamp Fluorescent lamps have much higher efficacy than filament lamps. For the same amount of light generated, they typically use around ¼ to ⅓ the power of an incandescent.

Fluorescents were mostly limited to linear and a round 'Circline' lamp until the 1980s, with other shapes never gaining much popularity. The compact fluorescent lamp (CFL) was commercialised in the early 1980s.

Most CFLs have a built-in electrical ballast and fit into a standard screw or bayonet base. Some make use of a separate ballast so that the ballast and tube can be replaced separately.

Typical average lifetime ratings for linear fluorescent tubes are 10,000 and 20,000 hours, compared to 750 hours (110 V) and 1000 hours (240 V) for filament lamps.

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Bulbman

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light bulb: Definition from Answers.com

light bulb n. An electric light in which a filament is heated to ... Like all light bulbs, the number represents the diameter of the bulb in 1/8s of an inch. ...www.answers.com/topic/incandescent-light-bulb

BuyLighting.com

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Atlanta Lighting and Light Bulb Sales

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News about Light Bulbs

SUSSEX: Recycle your compact fluorescent bulbs

The Daily TimesDOVER — The Delaware Energy Office is launching a statewide recycling program today for compact fluorescent light bulbs.http://www.delmarvanow.com/apps/pbcs.dll/article?AID=/200810...

Save some money with cheaper florescent bulbs

WWMT 3 KalamazooMICHIGAN (NEWSCHANNEL 3) - With home heating bills expected to jump 21 percent this winter folks are trying to find ways to save a little money. Starting Wednesday you can get energy efficient light bulbs for a cheaper price.http://www.wwmt.com/articles/money_1354019___article.html/sa...

Michigan: Cheaper energy-efficient bulbs available

Detroit NewsLANSING -- Michigan officials say now is the time to buy energy-efficient light bulbs because they are being sold at a reduced rate.http://www.detnews.com/apps/pbcs.dll/article?AID=/20080930/B...

Change a Light, Change the World

PR Newswire via Yahoo! Finance Indianapolis Power & Light and the Midwest Energy Efficiency Alliance are launching the 2008 Change A Light, Change The World campaign to help consumers save money and energy with ENERGY STAR® qualified compact fluorescent light bulbs .http://biz.yahoo.com/prnews/081001/aqw540.html?.v=25

How to save money on your phone bill -- TODAY

Chicago Sun-Times Looking for ways to save on your telephone bill? The Citizens Utility Board, a nonprofit utility watchdog group will host a free phone-bill clinic and give out money-saving light bulbs today from 9 a.m. to 3 p.m. at ShoreBank's Chatham Banking Center, 7936 S. Cottage Grove. http://www.suntimes.com/business/currency/1199372,CST-FIN-cu...

News about Light Bulbs

Dim Bulbs: Those Squiggly “Green” Light Bulbs Could Hurt the ...

Wall Street JournalThe law of unintended consquences strikes againâÃÂ...http://blogs.wsj.com/environmentalcapital/2008/10/01/dim-bul...

GE prices $12B offering at discount, shares tumble

ForbesGE, which makes everything from light bulbs to jet engines and owns NBC Universal, has cut its earnings forecast twice since April due to problems with GE Capital. It has also announced a reorganization and unveiled plans to spin off or sell its ... http://www.forbes.com/feeds/ap/2008/10/02/ap5503970.html

Fluorescent bulbs offer mercury advantage

Science NewsWhich Is Better? Switching to a light bulb (left) that contains mercury can often cut overall releases of that toxic element into the environment. iStockphoto-morpheusdog Fluorescent lighting uses less energy than comparably bright incandescent bulbs ... http://www.sciencenews.org/view/generic/id/37099/title/Fluor...

Free bulb exchange for Hancock-Wood members

WNWO.comMore Local/State News... Members of Hancock-Wood can switch their inefficient incandescent light bulbs to new, energy-saving CFLs (compact fluorescent light bulbs), and itÃÂÂÃ...http://www.wnwo.com/news/news_story.aspx?id=200805

Caddo encourages 'Green' light bulb competition

The Shreveport TimesCaddo government is encouraging parish employees and residents to participate in a national green competition that includes, among other things, switching out old light bulbs. The move is part of the National Association of Counties Green Government ... http://www.shreveporttimes.com/apps/pbcs.dll/article?AID=/20...

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Amazing Light Bulbs

Your party light bulb and special effects lighting headquarters for online purchases and delivery directly to home or office.http://www.amazinglightbulbs.com/
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Answers for Light Bulbs

jaskop1

Why do my light bulbs keep burning out?

jaskop1Depends. If you leave them on a lot it may be just the hours you are burning them. But where mine usually burn out the fastest is on the first floor ceiling where the kids bedrooms are on the 2nd fl...
the_girl_next_door

Are white fluorescent light bulbs better for the eyes or the yellow incandescent ones?

the_girl_next_doorIn my bedroom I use a blue bulb, it states on the packet that its the closest thing to daylight. I find I can read longer as my eyes don't tire as quickly which, as a student, would definately benefi...
Longboardbro

How many light bulbs are used everyday or everyyear in the world? How many homes in a country?

Longboardbroa. lots b. lite brite (\__/) (='.'=) ('') (")
Dr. Ernest J Folk

How do you feel about the incandescent light bulb being replaced with Compact Fluorescent bulbs?

Dr. Ernest J FolkI love the new CFL's CFLs save up to 75% less energy because they operate at lower temperatures and they last up to 10 times longer than incandescent light bulbs. To me this sounds like a no braini...
win222

Why do my light bulbs burn out so fast?

win222it sounds like there is too much heat. do you know if there is a heat duct in the same joist space as the fixture? or is the fixture in a joist space used as a cold air return? that could be a problem...

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