Nova Extreme T5HO Freshwater / "watts per gallon or.." thread
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Old 12-12-2007, 12:23 AM   #1
forddna
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Nova Extreme T5HO Freshwater / "watts per gallon or.." thread


Please help! I bought a 54g corner setup today (will start a journal soon), and I bought a light fixture at the same time. I bought the Nova Extreme 24" 48w T5 HO (pink and white bulbs). I was told this was "enough" lighting.

Well how do I know? What are your thoughts?
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Old 12-12-2007, 01:19 AM   #2
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It has a TOTAL of 48W? That would be quite low, even for VHO. How tall is your tank? That has a lot to do with how much lighting you need.
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Old 12-12-2007, 01:20 AM   #3
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Also, pink and white is not a good description of the color temp

There should be some marking somewhere of the temp.
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Old 12-12-2007, 01:22 AM   #4
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Is it a single 48 watt bulb?
Uh-oh. Who said it was enough light, and did they know you wanted to have a planted tank?
BTW, pink and white to me sound like the colormax bulb.
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Old 12-12-2007, 01:22 AM   #5
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If its the strip lights then they usually have the Kelvin rating(which I believe is the same as the temp, correct me if Im wrong) and not on the bulb. IMO you would need to up your lighting to something different.
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Old 12-12-2007, 02:16 AM   #6
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They are 2 x 24 watt, one white, one pink (the pink is for plant growth).

Okay, the box says:

24 watt Freshwater SlimPaq T5HO Lamp
24 watt 10,000K SlimPaq T5HO Lamp
German Parabolic Reflector

"A revolutionary fixture that produces greater lumins per watt than all other fluorescent aquarium lighting systems"

"Deep penetrating light rays - promotes optimum plant growth"

What they guy told me (after I told him it was for plants) was that with these kind of bulbs, you can't look at wpg like regular fluorescents. He said watt for watt, they don't compare.
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Old 12-12-2007, 02:25 AM   #7
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And in a way he is correct, compared to a NO (normal output) fluorescent, they don't compare, but still probably IMO not enough. Hopefully someone with more T5 HO can chime in here.
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Old 12-12-2007, 02:27 AM   #8
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I would be more concerned with the depth of the tank with 24W bulbs. Higher watts are needed for deeper tanks no matter what spectrum. A corner 54 " is 30" deep aint it ?
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Old 12-12-2007, 02:28 AM   #9
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Sorry. Forgot to answer that. It's 22" deep (high).
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Old 12-12-2007, 02:44 AM   #10
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T5HO is ~ 1.5watts.of.light per watt of consumption
This is with good reflectors of course

Given your tanks depth and the OK reflectors of your fixture, something like 1.3 would be a better figure.

You should have about 1.25"wpg" of light.
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Old 12-12-2007, 02:53 AM   #11
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Thanks. I am open to going back and getting the 18" fixture also (that's all I have room for), but I wanted to be sure I needed it before putting the money out.

Edit - I looked at the 18" online. It is 36w. By calculating it at 1.3 like you suggest, that puts me right at 2wpg (2.0222 or something like that). Oops..the 18" is in the saltwater category..different lamps. Should still "work" though..
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Old 12-12-2007, 03:02 AM   #12
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http://www.current-usa.com/novaextremet5hox2.html
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Old 12-12-2007, 03:10 AM   #13
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Aye, those little fixture are pretty reasonably priced!

Take into consideration that your fixtures will be resting on glass, so the extra bit of heat and light having another medium to pass through will inch down you wpg a little. This would be a lowish light tank.

If you wanted to do the full-blown planted tank something like these would be IDEAL for a corner tanks

http://www.aquaticeco.com/index.cfm/.../3777/cid/1120

^^ a very well priced hqi pendant
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Old 12-12-2007, 03:12 AM   #14
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Mine won't rest on glass. I'm hanging them from the canopy well above the water, and I opted out of buying the glass tops. Thanks for the link! I see those used for sale all the time on saltwater forums. I'll keep an eye out.
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Old 12-12-2007, 03:14 AM   #15
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GL, I'll be keeping an eye out for your journal!
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