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Old 04-09-2006, 02:38 AM   #1
nicksgirl7705
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Question


Nothing specific.. lol couldn't think of a title..

If I had three of these bulbs -

(Sorry about the crappy picture, had it on macro setting and forgot to turn it off)

Over my 20 gallon tall, would that work? We bought them at Home Depot and they aren't especially made for fish. I couldn't find much about them on the box, but here it goes:

65 watt output, 14 watt input
Fluorescent
10,000 life hours

It comes with a disk shaped reflector that I can lay on the top of my tank. One on each end and one in the middle.

Would this work or am I retarded?
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Old 04-09-2006, 04:51 PM   #2
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Anyone know?
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Old 04-09-2006, 05:45 PM   #3
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Alot depends on the color temperature of the lamp. I know they make those bulbs in 6700k. If that's what your's are, they yes they will work. Of course it's not the most effective lighting, and don't fool yourself into thinking you have 65 watts from each bulb shining into your tank.
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Old 04-09-2006, 05:52 PM   #4
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Oh I know, lol, my dad was like you have like 300 watts! Funny..

How do I figure out what the color temperature is? All I know is when it's over the water, it's a yellowish-gold look.

How many watts are actually going into my tank? Are three of those more effective than my 15 watt standard bulb that came with the tank?

Thank you so much for the reply and the much needed help!
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Old 04-09-2006, 06:00 PM   #5
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they're 14w each so you'd have 42w. They will work.....when I had a 38g tank I used those and had good plant growth. If they're yellow though they probably are not the 6700k ones.
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Old 04-09-2006, 06:05 PM   #6
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Bleh. Will they not work unless they're 6700k or around there? What does yellow mean?
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Old 04-09-2006, 06:12 PM   #7
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Quote:
Originally Posted by nicksgirl7705
Oh I know, lol, my dad was like you have like 300 watts! Funny..

How do I figure out what the color temperature is? All I know is when it's over the water, it's a yellowish-gold look.
It should be written on the package. It's a number between 3000 and 10000 followed by a K. You'll want higher than 5000 and lower than 8000 for the best effect from those lamps. Most of them are 3000k, 5000k, 6700k or 7100k. It sounds like yours are in the 3000-ish range since they are yellow.

Quote:
Originally Posted by nicksgirl7705
How many watts are actually going into my tank?
Hard to tell. I'd just consider it low/medium lighting and not worry about an exact number. Lots of very nice plants can grow well in that lighting range, and you get the benefit of lower maintenance and less ferts being needed. Add a D-I-Y CO2 setup and dose 1/2 EI or Seachem using their chart and you'll be off to a good start.

Quote:
Originally Posted by nicksgirl7705
Are three of those more effective than my 15 watt standard bulb that came with the tank?
Much much more effective. Those 15 watt fluorescents are made for looking at fish, not for growing anything.

Quote:
Originally Posted by nicksgirl7705
Thank you so much for the reply and the much needed help!
You're most welcome!
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