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Old 09-19-2005, 01:21 PM   #1
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New 250w Retro MH's (update pics)

Hey all I just purchased (3) 250w MH retro kits with 15k xm bulbs.

They will be here Wednesday and I am going to post the DYI for this project.

They will be placed into my current hood, and only be 4 - 6 inches off of the water. I know this may not be the best thing to do, but I am going to give it a try...(I do not want to build a new hood unless I have too)

For all you that have done this, what should I be prepared for?
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Old 09-19-2005, 01:47 PM   #2
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where did you get the retros from?
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Old 09-19-2005, 02:38 PM   #3
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They are very easy to do. The hardest thing I could image you would run into is finding something firm in the hood to screw them into. Get some small tie wraps with the hole on them to screw them into your hood to hold all the wires in place.
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Old 09-19-2005, 02:47 PM   #4
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just keep an eye on the temperature of the tank rev..Mine are 12 inches above the surface, with fans blowing and the heat output is intense. That close to the water, you may have issues. (hopefully not tho) I have wanted to lower my lights and am afraid to try it.
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Old 09-19-2005, 03:20 PM   #5
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Just keep an eye on the center brace. In did the same thing a while back, and it started melting it a little.

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Old 09-19-2005, 03:27 PM   #6
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Thanks for the comments all...

sabotaged - I actually got them from hellolights...$452 shipped w/bulbs....

Brenden - I am installing a 1/4" peice of plywood painted white onto the hood top....

Hara- I hope I dont have issues......do you think that close will give me enough light spread over the 6 ft tank?

Salttanker - The braces on the 125 are just perfect to where there will not be an issue with that...at least I hope not.

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Old 09-19-2005, 03:51 PM   #7
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each bulb should cover 2 ft, even at that close. I am pretty sure your whole tank would be covered by light.
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Old 09-19-2005, 04:36 PM   #8
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If your lights are going to be that close to the water it may be a good idea to use epoxy paint or something that water can not penetrate or else your plywood will bow up and come to pieces especially with the moisture and heat it will be exposed to. (aluminum flashing may work) Mine are 12" away from the water and they still get wet from current and bubbles splashing on the surface of the water.
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Old 09-19-2005, 10:00 PM   #9
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I could not imagine having them that close. You will have heat issues. I have mine about 12" off the water as well. It is all I can do to keep temps lower than 82 and I have the basement sump. You might need to keep your room temp cool.

Make sure you have fans or something else in there for air circulation. I have 2 fans blowing out and one in. The 2 out run all the time and the other runs with just the MH's.

You could always build something to lift your current canopy. That is sort of what I did. Or suspend the current canopy. I have seen some setups like this that are nice looking. Lets a lot of light in the room though.

If you figure it out, let us know
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Old 09-20-2005, 01:01 AM   #10
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Besides watching for heat issues, I would highly suggest using the "screen" light acclimation method rather than just a shortened photo period. I learned first hand that going from fluorescents to MH will cause coral, etc. much stress even if used for only an hour or two at a time in the beginning. In the long run though nothing beats MH-nothing. Best of luck to you and welcome to the brighter side you'll love it 8) .
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