Types Of Lighting
IncandescentThis is the familiar light bulb found in most homes. Light is produced by heating a tiny filament until it glows. Unfortunately it produces much more heat than light — about 90 per cent heat and 10 per cent light. This heat is usually wasted because it's generated at the wrong time or in the wrong place.
It's easy to be confused by all the different incandescent lamps on the market — general service, eye saving, shadow ban, extended service. Here is a chart that gives you the advantages and disadvantages of each.
The most energy-efficient is the general service which gives the most light (measured in "lumens") for the watts consumed.
Strange as it may seem, one lamp of higher wattage will give more light than the same wattage from two smaller lamps. Example: one 100-watt lamp will give more light than two 60-watt lamps (1740 vs. 1720 lumens).
Fluorescent
Most fluorescent lights are found in offices and schools, however they can bring important energy-savings to the home as well.
Fluorescent lighting is over 5 times as efficient as incandescent lighting, on a lumens per watt basis.
Fluorescent lighting can also be confusing. There are many types on the market: "cool white" and "daylight" are the most popular. Cool white produces the most lumens, while daylight is a softer light. Cool white also produces more glare unless shaded.
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May 20, 2012