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Old 06-07-2014, 01:07 AM   #1
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T5HO light fixture on glass cover?

Can I put my T5HO 2x54w right on the glass cover for the tank rather than raising it on legs? Any reason that's a problem? I'm wondering about the heat?

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Old 06-07-2014, 08:27 AM   #2
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Can I put my T5HO 2x54w right on the glass cover for the tank rather than raising it on legs? Any reason that's a problem? I'm wondering about the heat?
It would be best to use the legs to prevent heat issues. Too much heat buildup can damage the fixture or bulbs.
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Old 06-07-2014, 08:51 AM   #3
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Could crack the glass if it gets too hot
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Old 06-07-2014, 08:57 AM   #4
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Could crack the glass if it gets too hot
I'd be more worried about fire honestly.
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Old 06-07-2014, 09:22 AM   #5
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It would be best to use the legs to prevent heat issues. Too much heat buildup can damage the fixture or bulbs.
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Could crack the glass if it gets too hot
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I'd be more worried about fire honestly.
All of the above.
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Old 06-07-2014, 07:30 PM   #6
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Ok thanks. The reason I asked is because the legs didn't fit. Right now it's about 1 inch over it. Is that enough?
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Old 06-07-2014, 09:27 PM   #7
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Why don't the legs fit?

And inch should be enough to prevent fires/cracking hopefully, but you'll probably still be running really hot. It will decrease the life of the bulbs significantly in addition to limiting output (how bulbs don't work as well).
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Old 06-07-2014, 10:08 PM   #8
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FWIW I have a 3 bulb t5ho fixture sitting right on top of a dual glass top 55g and it doesn't get abnormally hot from what I've seen. Have been running it like this for 3 or 4 months.
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Old 06-08-2014, 02:51 AM   #9
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I tried this once and the glass definitely cracked overnight and the fixture got really hot.

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Old 06-08-2014, 02:56 AM   #10
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Why don't the legs fit?

And inch should be enough to prevent fires/cracking hopefully, but you'll probably still be running really hot. It will decrease the life of the bulbs significantly in addition to limiting output (how bulbs don't work as well).
I got the Odyssea 48" thinking it would fit my 48" tank but it has expendable legs and is actually meant for a longer tank.

I put my hand on the glass after the lights had been on 4 hours and the glass was not at all hot. In fact even the light itself was not that hot so hopefully will be ok?
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