Wednesday, February 1, 2012

CFL’s VS Incandescent Bulbs


For well over a century we’ve been using incandescent lights to illuminate the interior of our homes and our surrounding properties. Though these Edisonian bulbs have faithfully advanced technology, brightened the nebulous hours, and provided us with light to live by, the time has come to integrate their energy efficient counterparts, the CFLs.

A CFL, or compact florescent light, is a bulb made of glass tubing filled with gas and small amounts of mercury vapor. Electricity passes through the bulb exciting the mercury molecules and causing them to emit ultraviolet light. This UV light is invisible to the human eye until it comes into contact with the colored coating of the bulb.

An incandescent light, on the other hand, consists of a glass bulb with a thin, tungsten filament coiled inside. Electricity heats up the filament which then emits visible light. Unfortunately, most of the electricity drawn by an incandescent bulb is wasted as a heat byproduct. The filament must reach a high temperature before it can emit the right amount of light. This means that only 5% to 10% of the energy used is actually converted into light.

ENERGY EFFICIENCY AND LONGEVITY: 
Since CFLs don’t have to physically heat up a component like incandescent bulbs do, they require much less electricity, and are therefore much more energy efficient. In fact, CFLs only require 15 Watts or less to produce the same amount of light as a 60 Watt incandescent bulb. In other words, CLFs only use a quarter of the energy that their counterparts do. Furthermore, since CFLs aren’t under the same physical stresses that incandescent bulbs are, they tend to last longer, about ten times longer (five years or more) in fact.

If utilized on a large scale, CFL efficiency and longevity would alleviate several environmental strains.  For one, using much less energy with CFL’s would significantly lessen pollution from power producing sources.  Similarly, due to durability, the market would require less bulbs, less frequently. This means that there would be a drop in pollution from manufacturing sites as well as less waste entering landfills.      

CONCERNS WITH COST AND MERCURY:
Though energy efficient and durable, some uncertainties with CFLs still linger in the minds of consumers. Cost is always an important factor to consider, especially during hard economic times. A single CFL bulb can cost $3, whereas an incandescent bulb only costs 50ȼ on average. Though they cost more upfront, CFLs pay for themselves in about six months, and will save $40 or more in electricity savings over the course of its life.

There is also a notable health concern with CFL’s due to the small amount of mercury, a toxic substance, which they contain. Each CFL bulb contains about 4 milligrams of mercury and should be handled carefully if broken. However, even if every CFL used were broken, incandescent bulbs would still contribute about 4.5 more milligrams of mercury pollution than their counterparts because of their extra energy requirements. Lucky, CFL’s are fairly rugged and facilities are in place to dispose of them safely. HERE are instructions on how to properly cleanup a broken CFL.      

Recent legislation suggests that it may be difficult to purchase incandescent bulbs in the U.S. in the near future. However, as with all legislation, we need to empower ourselves with knowledge of why the change is being made and the positive and negative effects that may come about as a result. In summation, switching out incandescent bulbs for CFLs will hopefully bring forth these positive results: less waste entering the landfills, less pollution (especially mercury) from power producing sources, less pollution from manufacturing facilities, and money savings for us all in the long term.

HERE is a excellent site that can help locate CFL recycling facilities near you!

And, for those interested in purchasing CFL’s, ENERGY STAR has some great information and a wide selection of products.

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