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Old 03-10-2005, 09:24 PM   #11
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Can you run T5 directly on-top of your tank? i.e. don't have to hang them from the ceiling or use legs?

I have my Coralife 96x2 PC sitting directly on the glass top. Could one run a T5 hood/fixture this same way?

Marine Tank: Oceanic 58 Gallon RR â–* Established October 2004
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Old 03-10-2005, 10:23 PM   #12
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they recommend about 3 - 3.5 inches above the water level. if you sit it directly on top of the tank, it would be a bit too close.

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Old 03-10-2005, 11:31 PM   #13
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I have the same thing as MoeJoePHD... only on a 75g. I got the CoralVue 4x54w retro kit from Darin at CaptiveReefs (a big saving of money - 225 vs 500+) and I thought these things were bright as ever!! Even people comment on how bright they are.... the colors are really nice with my 2x10k 2x03 actinics... clear white light. BUT, in the past few days I have had a scare and was on a Metal Halide additon hunt because I had two true percs and they had been doing fine for the few days I had them... went out and got a green bubble tip anemone. All was fine that evening and into the wee-hours of the morning and then the next evening - WHAM.. he was super shriveled and bright green and oozing and losing body parts...pull him gradually off the overflow and he was dead 40.00 down the drain and my lfs says "tough". (never going back to those arses btw) I even asked if I could just have 10.00 off of another later - but nooooo. Anyways... at first I thought it was the lack if light and then I look at my water temp which had been a consisten 80 for weeks and it was 76.8!!!! I realized my heater had came unpugged when fiddling with stuff! It seemed my fish were not as active (still lively though) and a few sponges that came with my lr looked weak. Everything seems well though now. SO, I don't know if it was my lighting or the low temp Sorry for all the rambling - though I would give my complete experience with life/t5's so far
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Old 03-10-2005, 11:33 PM   #14
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ohh and... these things put off NO heat... its rediculous. I put my hand all over my reflector... barely feels warm. I NEVER feel warmth on top of my tank. I can even leave my hands on the bulbs for the longest time. So, heat is not a factor with t-5... I mean none at all! hth
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Old 03-11-2005, 01:51 AM   #15
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Yea Aspec you can just put em on top of the tank thats how mine is set up intill i get my canopy all built, Like I said I am all for T5s, I also have 210k's and 2 03's, looks sweet!!
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Old 03-12-2005, 12:40 AM   #16
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There are a lot of ways to do this reef thing and you can definitely have success with t5's, pc's and mh's. While one kind of lighting may have a benefit that the others don’t have, they are all usable and sometimes you just have to make a decision. I have what I think is a reasonably fine 120 gallon reef that I've run with 520 watts of power compacts for a year now:

Still, I just bought a new fixture with two 250 watt mh’s and t5 actinic support so I could get some coral for the lower part of the rock. Under the pc’s, I had to have the corals toward the top of the rock because I found that the lighting didn’t penetrate down toward the bottom. (On the other hand, mine’s 24 inches deep and if it were shallower, say 18 inches, the pc’s would have been perfectly fine lower down on the rock. If I couldn’t afford the new lighting fixture, I would have been perfectly happy with the pc’s. By the way, I haven’t replaced any of the bulbs since I put them on the tank a year ago and I see no reduction in brightness, intensity, no algae blooms and no affects on the health of the corals in the tank.)

I could gotten a new t5 unit, which I hear very good things about, instead of the mh/t5 combo. But just researching which new lighting to buy was utterly confusing and I finally just had to make a decision, so I opted for the one that I bought because of heat issues that I felt were best resolved with my choice.
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Old 03-12-2005, 07:30 AM   #17
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If you price MH/T-5 units, as fishfreek said, and compare them to MH/VHO or MH/PC of equivalent wattage, the T-5's are very competitive. T-5 bulbs are more intense than VHO or PC. As for power usage, the bulb itself will use the wattage it's rated for, but that doesn't mean the ballast will only draw that much. Energy is heat...if your core/coil MH ballast runs hot enough to cook your breakfast on, you can bet it's pulling more than the amount needed to light the bulb. Whether it's a significant difference or not, I'm not sure. You can get a 48" 2x250w MH with T-5 actinics for around $725.00.

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