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Old 11-13-2012, 01:21 AM   #1
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The ad on craigslist is for a 48" 250 x2 metal halide fixture with suppl. Actnics & moonlights.
http://denver.craigslist.org/for/3405354521.html
They want 200 dollars for it, is that a good deal? Is this enough light for a tank to be handle coral?

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Old 11-13-2012, 01:28 AM   #2
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What is better, mh or t5?
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Old 11-13-2012, 01:30 AM   #3
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Or is a T5 better way to go? It's cheaper

http://denver.craigslist.org/grd/3400255528.html
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Old 11-13-2012, 01:06 PM   #4
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Well this is the same fixture from what I can tell. Odyssea 48 inch Metal Halide Fixture 2x250W HQI + 4x54W T5 +6xDual LED Some people like odyssea some hate them. I plan on buying one. To my knowledge T5 wont support as many corals as Halide but Halide is more expensive to run. Its a personal preference thing. I run a 175W Halide pendant over my 36" tank and everything looks really good. So I think I will stick with them. But I do want the t5 actinics to get that blue color. I know my buddy has this fixture on his tank and he likes it but says he has to replace bulbs about every 6-8 months. If I were you for a extra $100 I would buy it new.
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Old 11-13-2012, 01:25 PM   #5
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Metal halides typically punch deeper into the water column, but do create a lot of heat. Halides will also get you a shimmer effect which I (and I think most people) like. Looking at the picture, it looks as though that fixture has 4 T5s in it, so you're going to get more light out of that I think than a 6 bulb T5 system all other things being equal.

Odyssea offers inexpensive Chinese-made equipment. Quality seems to be hit and miss all over the board. Some questions I would be intersted in knowing before I would buy used are:

How old are the bulbs?

Are they the stock (original) bulbs?

If the bulbs are stock bulbs older than 6 months, you'll probably want to replace them in short order, which will run you about $180 or thereabouts. If they are aftermarket bulbs, see how old they are and what the brand name is. (Geisseman and ATI are good T5 manufacturers, Phoenix seems to be the gold standard in halides. There are some other good ones around as well.) If they are older than 9 months, you need to plan on replacing them soon.

If you're going to have to replace bulbs soon, for just a little more cash, I bet you can buy a pair of LED fixtures which will give you shimmer, and you shouldn't have to replace for 10 years or more. there are several individuals on the forums who have had good things to say about the Taotronics units.
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Old 11-13-2012, 01:53 PM   #6
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Okay, I will ask how old the bulbs are... would you recommend I do more of a DIY metal halide? How much wattage (hahaha) would you recommend for a 75 Gallon? Is a mixture of t5 and metal halide the best combination?
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Old 11-13-2012, 01:59 PM   #7
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I too am going back and forth between the odyssea unit and the taotronic led's. I just KNOW the Halides work lol. I have seen tanks lose color going from MH to LED even with the Kessil 350's so LED's still make me nervous...
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Old 11-13-2012, 02:09 PM   #8
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Quote:
Originally Posted by h8z2luze
I too am going back and forth between the odyssea unit and the taotronic led's. I just KNOW the Halides work lol. I have seen tanks lose color going from MH to LED even with the Kessil 350's so LED's still make me nervous...
Yes that is true, but some things also gain color. My zoanthids look different, but in a good way. Same goes for a couple of my lps. You really have to weigh the pros and cons. Look at how much it costs to run mh compared to led.. It's pretty significant especially when you add bulb replacements to the bill.
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Old 11-13-2012, 02:39 PM   #9
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Quote:
Originally Posted by bazeball05
Okay, I will ask how old the bulbs are... would you recommend I do more of a DIY metal halide? How much wattage (hahaha) would you recommend for a 75 Gallon? Is a mixture of t5 and metal halide the best combination?
You can't really go by wattage. Back in the day, everyone was using T12 or T8 normal output fluorescents, and we were making an apples to apples comparison. However, watts are a measure of energy used, not brightness. For instance, you can replace a 60 watt incandescent bulb with a 15 watt compact fluorescent bulb and not lose any brightness (although the color may be different -that's what we call temperature.). Brightness is generally measured in lumens, but a better measure is PAR (photosynthetically active radiation). Unfortunately, it's about impossible to get either measurement without having the fixture and an appropriate meter.

The fixture you posted from Craigslist is AOK in terms of brightness for whatever you'd want to keep, provided you get decent bulbs.
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Old 11-13-2012, 04:07 PM   #10
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Quote:
Originally Posted by needmorecowbell View Post
Yes that is true, but some things also gain color. My zoanthids look different, but in a good way. Same goes for a couple of my lps. You really have to weigh the pros and cons. Look at how much it costs to run mh compared to led.. It's pretty significant especially when you add bulb replacements to the bill.

Are you running the taotronics?
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