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Old 04-01-2011, 10:33 AM   #1
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Shifting to overdrive

I purchased an entire tank setup and I'm slowly upgrading it. Today I'm adding lights. It is a 75 gallon reef with a 30 gallon sump. 75 lbs of live rock. It currently has a 48 inch T12 10,000 K and a 48 inch T12 50/50 actinic. I only have enough room to add 2 more bulbs so I am going to overdrive them. I have 2 more bulbs exactly like the 2 that I already have. The question is, which 2 do I overdrive? Both actinic? Both 10,000K? Or 1 of each.
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Old 04-01-2011, 01:50 PM   #2
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are these normal output or VHO lamps? if they are VHO, you should get by with 4 of them for a lot of corals.
if you want to overdrive them, i would overdrive them all.
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Old 04-01-2011, 03:10 PM   #3
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Well that's the fun part. Some are VHO and some are not. I have a VHO actinic a VHO 10,000 K and the other 2 don't really say what they are. They are a Coralife 50/50 and Coralife 10,000 K. The Coralife say "high-intensity". All are 40 watts.
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Old 04-02-2011, 02:13 PM   #4
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I decided to OD the 10,000 K and the 50/50. My math works out to 2:1 white to actinic. I'm not sure if that's the best way or even if my math is right but the rank looks good.
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Old 04-02-2011, 06:56 PM   #5
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even the daylight bulbs are full spectrum so supplemental actinic light is just for aesthetic purposes.
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Old 04-02-2011, 10:14 PM   #6
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Oh ok thanks. So it's probably better to overdrive both 10,000 K bulbs and not the actinic?
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Old 04-03-2011, 10:10 AM   #7
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i think the daylight lamps put out more PAR than the actinics, but again, i would overdrive all of the lamps.
so, you have a 75 gallon tank that has a 4 x 40 watt VHO setup on it?
what are you over driving them to? what do you intend to keep?
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Old 04-03-2011, 11:24 AM   #8
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When I got the tank it had 2 4ft coralife flourescent lights. I don't know if they are VHO or not. They say "high intensity". I added 2 more 4 ft flourescents that are VHO. I have a 4 light ballast so I am going to x2 overdrive them. I don't plan on changing the first ballast because I am changing over to a 125 gal tank with all new lights in a few months. So overdriving those 2 is probably out. The goal is to start adding some more corals. It currently has some button polyps, some mushrooms and a Haitian Condy that I know were not getting enough light.
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Old 04-03-2011, 12:02 PM   #9
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how long have the corals and anemone been in the tank? has the anemone moved up to the top of the rock yet?
i have a green bubble that prefers to be about 8" from a 250 watt halide.
naturally, every increase in lighting is helpful.
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Old 04-03-2011, 12:43 PM   #10
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i've been considering overdriving a 4 lamp T5 system i just don't know which ballasts to use and i've been looking at wiring diagrams to do so and on;y find ones for T8/T12s. i only have the space for a 4x24" so i'm hoping i'll be able to pump out as much wattage as a 6 lamp would
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