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Old 05-22-2014, 08:54 PM   #11
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I have 25 watt 5000K's now. I still want to finish this project though.

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Old 05-23-2014, 10:02 AM   #12
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3/4" ? I may not be following correctly? ? You're wanting to build a whole light hood with existing hardware? You could use 4+" pic and rip it in half the long way

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3/4" PVC is for the frame of the lamp. The head itself will be constructed from something much larger.

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Old 05-23-2014, 10:03 AM   #13
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Oh to suspend it?

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Old 05-23-2014, 12:07 PM   #14
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Yes. I thought I made that clear but I have been known to consider riddles clear as day.

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Old 05-23-2014, 12:13 PM   #15
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Right right, hob.. more like sot.(suspend over top) sematics.. I'd use threaded pipe and fittings.. the pvc is going to be flimsy.. some copper with saudered fittings would look awesome.. expensive but awesome.. than again plain old steel painted black would be cool too

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Old 05-23-2014, 09:13 PM   #16
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The copper does sound like an idea for a production version. I can probably build two or three frames and equip them for less than I can buy one equivalent factory-built lamp the way prices are.

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Old 05-23-2014, 10:38 PM   #17
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There is such a thing as too much light and this would surpass that amount by a large amount. You would more than likely fry any plants in the tank, overheat the water like crazy, severely stress out the fish, and more than likely have an obscene algae farm assuming they can withstand the amount of light you would be pumping into a tank that size.

Go big or go home is nice... to a point
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Old 05-23-2014, 11:06 PM   #18
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There is such a thing as too much light and this would surpass that amount by a large amount. You would more than likely fry any plants in the tank, overheat the water like crazy, severely stress out the fish, and more than likely have an obscene algae farm assuming they can withstand the amount of light you would be pumping into a tank that size.



Go big or go home is nice... to a point

+1. I agree.


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Old 06-01-2014, 08:40 PM   #19
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I have the 70 watt lamp constructed but due to a ballast mismatch, I have to order a proper ballast. After checking the electrical characteristics of an M85 and an M98 metal halide, and seeing that they were listed identically, I was sure the ballast I had would suffice, but obviously not. The PVC frame, however, is great, and very stiff and strong.

While we're here, do single-ended (medium base) M98 metal halide lamps exist in 10,000K? ...or do they only exist in M85 double ended configurations below 150 watts and then jump to mogul at 175 watts?

I may also build additional sizes once I have created a working model. I plan on making a 50 watt copper model for my 10g.

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Old 06-19-2014, 08:56 AM   #20
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Ballast come yesterday evening and the lamp is burning.

70 watt 4000K bulb shown.

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