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Old 10-30-2008, 11:53 PM   #1
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Swirly bulbs?

I have got my hands on some 26w=100w GE bulbs. I have researched them online and they put out 6500K. Do I count the 26 or the 100 for watts, and is this anywhere close to the right spectrum for a FOWLR. I also have a 20w actinic bulb that I am using. Are these bulbs good enough for my tank. If so how many? http://i119.photobucket.com/albums/o...d/S7303164.jpg
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Old 10-31-2008, 12:09 AM   #2
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you count the 26 watts and i have no idea if u can grow live rocks!
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Old 10-31-2008, 01:13 AM   #3
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Anyone else?
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Old 11-01-2008, 09:18 AM   #4
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That's a great bulb for growing algae. I have the same 1 over my sump. Would probably look like crap over a display tank tho. It is somewhat yellow looking.
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Old 11-05-2008, 07:55 AM   #5
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I have a couple of those running in a small wine cellar. The 6500K is white/blue-white for me.

I would not use them. However, I believe you would count the 100W as that is the equivalent output where the 26 is the energy consumed.
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Old 11-05-2008, 12:07 PM   #6
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No, you count the 26 watts, just because incandescent give off lots of heat you cannot compare as those are horrible lighting
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Old 11-05-2008, 04:29 PM   #7
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I'll chime in, and probably confuse the issue more!

Regarding the 26W vs 100W... as far as household lighting is concerned, one of those 26W fluorescent bulbs gives off the same amount of "light" as a 100W incandescent. "Light" is an unexact/incorrect term here, because you're really talking about lumens or lux or par or some other scientific quantity of light. But sticking a bulb in a lamp, a 26W swirly gives off the same apparent light as a 100W old fashioned bulb. So I believe CaptainAhab is correct.

BUT...

We're not talking "reading" light here, were comparing aquarium lighting. And when people talk about 100W of aquarium lighting, they're not talking about incandescent bulbs - they're talking about fluorescent. They're talking about the amount of "light" 100W of fluorescent lighting (or MH) gives off. So if you're going to compare that swirly bulb with a real aquarium lighting fixture, in my opinion, you need to compare fluorescent watts to fluorescent watts - which would mean you'd use the 26W.

Regardless... I wouldn't use it.
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Old 11-06-2008, 08:55 PM   #8
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That actually clears a lot up! Thank you all for your input, however there is still one question unanswered. Is this spectrum good enough for "let's say" additional lighting?
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Old 11-06-2008, 09:00 PM   #9
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I would not use it to light a display tank. A refugium is a different matter though. I have a 26w (100w) over my fuge and it does an amazing job in growing my macro algae.

Lighting is one of the things in this hobby that you have to drop the coin for. If you are wanting to go more effecient then look at T5 HO.
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Old 11-07-2008, 01:30 AM   #10
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Yup... lighting and skimmers - it seems like you get what you pay for.
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