Typically posed Questions -Information about Efficient Fluorescent Lighting CFLs as well as Mercury

by admin on August 13, 2010

Why really should people use CFLs?

Switching from conventional lighting bulbs (known as incandescent) to CFLs is an efficient, easy alter everybody in America can make right now. Making this alter will help to use much less electrical energy at property and avoid greenhouse gas emissions that lead to global climate alter. Lighting accounts for close to 20 percent from the average home’s electric bill. Vitality STAR qualified CFLs use as much as 75 percent less vitality (electricity) than incandescent lighting bulbs, last up to 10 times longer, price little up front, and supply a quick return on investment.

Other Ways to save besides using energy saving light bolbs is to sign up with a lower electric rate. it is easy and only takes a minute. Compare several EnergyPorviders in your are right from your home.

If every single house in America replaced just a single incandescent light bulb with an Power STAR qualified CFL, in one year it would save enough power to lighting far more than 3 million homes. That would prevent the release of greenhouse gas emissions equal to that of about 800,000 cars.

Do CFLs contain mercury?

CFLs contain a very small amount of mercury sealed within the glass tubing – an normal of 4 milligrams. By comparison, older thermometers include about 500 milligrams of mercury – an sum equal to the mercury in 125 CFLs. Mercury is an crucial part of CFLs; it permits the bulb to be an efficient light source. No mercury is released when the bulbs are intact (not broken) or in use.

Most makers of light bulbs have reduced mercury in their fluorescent lighting items. Thanks to technology advances and a commitment from members on the National Electrical Manufacturers Association, the regular mercury content material in CFLs has dropped at least 20 % in the past year. Some producers have even made further reductions, dropping mercury content material to 1.4 – 2.5 milligrams per light bulb.

What are mercury emissions brought on by humans?

EPA estimates the U.S. is responsible for the release of 104 metric tons of mercury emissions each year. Most of these emissions come from coal-fired electrical power. Mercury released into the air may be the key way that mercury gets into water and bio-accumulates in fish. (Eating fish contaminated with mercury would be the main way for humans to be exposed.)

Most mercury vapor inside fluorescent lighting bulbs becomes bound for the inside on the lumination bulb as it’s used. EPA estimates that the rest with the mercury within a CFL – about 14 % – is released into air or water when it can be sent to a landfill, assuming the lighting bulb is broken. For that reason, if all 290 million CFLs sold in 2007 were sent to a landfill (versus recycled, as a worst case) – they would add .16 metric tons, or .16 %, to U.S. mercury emissions induced by humans.

How do CFLs result in less mercury inside atmosphere compared to standard light bulbs?

Electricity use could be the main source of mercury emissions inside the U.S. CFLs use less electrical power than incandescent lights, meaning CFLs decrease the quantity of mercury into the environment. As shown inside table below, a 13-watt, 8,000-rated-hour-life CFL (60-watt equivalent; a typical light bulb kind) will save 376 kWh over its lifetime, thus avoiding 4.5 mg of mercury. If the bulb goes to a landfill, overall emissions savings would drop a little, to 4. mg. EPA recommends that CFLs are recycled where achievable, to maximize mercury savings.

Table 1 Light Bulb TypeWattsHours of UsekWh UseNational AverageMercury fromMercury FromTotal Mercury
Mercury Emissions(mg/kWh)Electricity UseLandfilling(mg)
 (mg)(mg) 
CFL138,0001040.0121.20.61.8
Incandescent608,0004800.0125.805.8

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