Light for 125 gallon tank
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Old 02-28-2012, 12:17 PM   #1
Jim_PA
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Light for 125 gallon tank


Thinking about going with a 60 inch light for my 72 inch 125 gallon tank.

Here my thoughts
I would have 12 inches not covered total. If I take 1 inch off from each side of the frame that gets me down to 10 inches. So 5 inches on each side. If I take into account my 2 corner overflows, that even less area. Do you think 60 inch light would work? This would give me 216 watts of light, I would think that should be enough. I can get this light for around 400, and it will fit in my hood, if I get a 72 or 2 36, they won't fit under the hood.

Thanks
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Old 02-28-2012, 04:58 PM   #2
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60 inche bulbs work great. I only ran 2 80 bulbs for a total of 160W on my 125. On my 180, I do similar. with them centered and raised 8 inches you will have no dark spots at the ends.

the bulbs are harder to get, special order and shipping, but are cheaper overall then 4 - 36 inch bulbs.
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Old 02-28-2012, 05:00 PM   #3
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60 inche bulbs work great. I only ran 2 80 bulbs for a total of 160W on my 125. On my 180, I do similar. with them centered and raised 8 inches you will have no dark spots at the ends.
After reading more about 60 inch fixtures, it looks like most only come with 48 inch bulbs, which I don't understand. Do you know anything about this?
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Old 02-28-2012, 05:04 PM   #4
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The number of watts you use isn't significant. The number of T5HO bulbs, and their spacing, plus the quality of their reflectors and ballasts is very significant. 60 inch T5HO bulbs are 80 watt bulbs. If the tank is 72L x 18D x 22H, you only need a single T5HO bulb providing light to any area in the tank. With an 18 inch front to back depth tank, 2 T5HO bulbs, separated about 6-8 inches should light up the tank pretty uniformly, and would give you about 50-60 micromols of PAR with the light sitting on top of the tank. Raise it 2-3 inches and the intensity drops to about 40-50 micromols, which is a very good light level to use. You can get this light from Catalina Aquarium, as a custom light, made using a 10 inch wide housing designed for use with more bulbs, but they will build it with just 2 bulbs if you ask for it.

I think it will light the ends of the tank adequately, too.
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Old 02-28-2012, 07:02 PM   #5
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The number of watts you use isn't significant. The number of T5HO bulbs, and their spacing, plus the quality of their reflectors and ballasts is very significant. 60 inch T5HO bulbs are 80 watt bulbs. If the tank is 72L x 18D x 22H, you only need a single T5HO bulb providing light to any area in the tank. With an 18 inch front to back depth tank, 2 T5HO bulbs, separated about 6-8 inches should light up the tank pretty uniformly, and would give you about 50-60 micromols of PAR with the light sitting on top of the tank. Raise it 2-3 inches and the intensity drops to about 40-50 micromols, which is a very good light level to use. You can get this light from Catalina Aquarium, as a custom light, made using a 10 inch wide housing designed for use with more bulbs, but they will build it with just 2 bulbs if you ask for it.

I think it will light the ends of the tank adequately, too.
Thanks for the info. I just talked with Catalina Aquarium, and they help me figure out what needed. They are going to build it today and will be sent out in the next day or so. Looking forward to getting it.

Thanks again.
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Old 02-28-2012, 07:14 PM   #6
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I cannot wait to see your tank once you have it all set up! like seriously excited

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Old 02-29-2012, 06:05 AM   #7
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I cannot wait to see your tank once you have it all set up! like seriously excited

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I am excited for it to be setup as well. I started a Journal, since I cannot sleep tonight. I need to get a move on it, over the next few days, as I have bunch plants that will be here on Saturday.
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Old 05-13-2012, 01:14 AM   #8
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Any updates on your fixture?
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Old 05-13-2012, 03:40 AM   #9
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http://www.plantedtank.net/forums/ta...ml#post1762484
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Old 05-13-2012, 12:40 PM   #10
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Thank you sir!
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