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fluorescents are about 5x as efficientso a 12W will give about as much light
Fluorescents are always 3-4 times more efficient than halogens which are a version of incandescent bulb.
They are extremely efficient in their use of energy for producing light. Better even than compact fluorescents, and they do not liberate mercury into the einvironment over their lifetime as CFs do. There are some adverse effects in their manufacture, and eventual disposal... as with any "product".
250W tungsten halogen gives around 10,000 lumen. 2 x 39W T5 fluorescents gives a total of between 4,000 to 6,000 lumen.
Is this a fluorescent fixture? Most fluorescents will not start if the fixture is not grounded. Make sure the fixture has the branch circuit ground wire properly connected.
fluorescents
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Fluorescent have had an impact on ozone. They do destroy it.
Fluorescents do offer some savings, but the new way to go is through the Green bulbs. Fluorescents provide a hermonic sound that can provide health problems including headaches and migrains.
PCH: Fluorescents
Depending on the length, between 30 and 60 Watts of power for fluorescents and around 10 Watts for LED T8'sHeat is negligible for the LEDs, and almost negligible for Fluorescents*exact numbers not available at the moment.
Fluorescent lighting is the number one used lighting used in offices. You can find out more at PG&E.com.
fluorescents are about 5x as efficientso a 12W will give about as much light
Some people can actually see a strobing effect when they use fluorescent lights and they drive them nuts. Standard fluorescents have a very yellow-green glaring distortion in their color spectrum. Doing detailed work under them can be really hard on the eyes. I only use 5500-6500K full spectrum fluorescents because they are the most natural light you can get, even better than incandescent (which is high in yellows and reds). Full spectrum fluorescents help me match colors and is easier on my eyes than other types of light when I use the computer. When you stare at the screen and look away it's better for your eyes if the ambient light is as natural as possible. Full spectrum fluorescents are used in the treatment of S.A.D. (seasonal affective disorder, or seasonal depression) so they can be good for you.
32watt fluorescents are the best light bulbs because they create soft and even lighting with no shadows.
Fluorescents are curly-cues, where as incandescents are the classic (now banned) bubble-shaped ones.
compact fluorescents are lowest in energy use for most houshold applications