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post #1 of 8 (permalink) Old 07-24-2003, 03:57 PM Thread Starter
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i was wondering if a desk lamp with a 40 watt spiral CF bulb would work over a 1 gallon tank or 2.5 tank with clear lid. everyone says a lot of the spural bulb's lighting is lost.
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post #2 of 8 (permalink) Old 07-24-2003, 05:23 PM
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I've done it, but yes a lot of the light is lost, it certainly wont be too bright.

My 22 Gallon tank is lit using screw in CF bulbs though and it works very well.

Check out the following thread, I reviewd some panasonic bulbs...

https://www.plantedtank.net/forum/viewtopic.php?t=870
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post #3 of 8 (permalink) Old 07-24-2003, 08:20 PM Thread Starter
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could you tell me where to buy that bulb online? i can't seem to find it in the hardware stores. preferably an american online store to save shipping costs.
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post #4 of 8 (permalink) Old 07-24-2003, 09:04 PM
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I have no idea.... i bought mine in Canada
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post #5 of 8 (permalink) Old 12-07-2003, 09:39 PM
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do you really lose a lot of light with these bulbs if you have reflectors
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post #6 of 8 (permalink) Old 12-07-2003, 09:50 PM
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Because of the spiral, a lot of the light is aimed at the other twist, though I don't see why it is any worse than the losses from the inner side of a two tube CF, where the light hits the other tube.

I think the inefficency lies in the short length, the coverage just isn't as good as a long tube.
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post #7 of 8 (permalink) Old 02-06-2004, 05:25 AM
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How do these bulbs stack up against the "purpose made" screw in types for aquariums?
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post #8 of 8 (permalink) Old 02-06-2004, 12:35 PM
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I sure don't know, in my tanks, the 19 watt screw-in daylight spiral is more light than the 10 watt double u-tube screw-in aquarium light, nearly twice as much? umm, I don't know, maybe, yeah, probably. But, the spiral is wider than the u-tube, so may not fit in hoods where you have a reflector.

The very, very, old hood I use the spiral in has no metal reflector, may have been a reptile hood for all I know, HartzMountain brand?, and has no glass cover to shield the bulb from water.
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