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Old 01-27-2003, 10:36 PM   #1
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Driving you all crazy

ok...this lighting issue is still driving me crazy. I keep getting conflicting info from the vendors when I call and ask questions.

Today I was told that AB is discontinuing the making of their 110 volt product line and will stick to the European market. Also, that all manufacturers were going to be moving away from HQI bulbs. Yet, I am reading that the HQI gives you twice the lumens of a normal MH bulb in the same wattage. I also read that HQI is cheaper and cooler to run.
Then I talked to the guy at Aquadirect that said the only advantage of HQI over MH is about 3% improvement in lighting. The overall output is twice as much as a MH, but the surface area of an HQI bulb is less than half of a MH, and so it evens out.

argh...I was hoping to have a lighting system bought by now...but I just keep confusing myself. Can anyone relate any real experience with this?
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Old 01-27-2003, 10:49 PM   #2
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In the 2002 Marine Fish and Reef USA annual Sanjay Joshi did an article Spectral Analysis of Metal Halide Lamps. In the article, if I remember correctly a 150W HQI bulb (w/reflector) was compared to a mogul type 400W (unreflected) MH bulb. The hqi was almost as intense as the 400W, I'm not real sure if it says more about the bulb or the need for a good reflector. If you can get a back issue (I think the new one is out now) you should check it out, if you can't let me know and I'll scan the article and send it to you (might have to be snail mail, my scanner get's confused on hard words sometimes).
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Old 01-27-2003, 10:56 PM   #3
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I have read the article.....so, are you saying this is what you would do?

Look, this is all your fault anyway...well, all of you here that talked me into saltwater...so the least you can do is help me spend my money.
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Old 01-27-2003, 11:04 PM   #4
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To be perfectly honest...I don't know what I would do. I would probably go with moguls, IMO, mogul based MH are more durable and have a longer life. From what I have read...the hqis are overdriven by 110v ballasts, they are designed for the European market. That is why you get the increase in intensity, but I would think with the increased intensity...you get shorter bulb life and accelerated spectral shift. the candle that burns at both ends..., the mogul based bulbs are also less likely to break due to splash.
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Old 01-28-2003, 12:20 AM   #5
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Don't the HQI fixtures also have to have a UV filter between the bulb and the water?
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Old 01-28-2003, 09:11 AM   #6
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Yes they do. The complete hood comes standard with it.
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Old 01-28-2003, 09:34 AM   #7
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Is there a price difference on replacement bulbs?
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Old 01-28-2003, 01:58 PM   #8
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There is a price differene of about 20. + or-, depending on who you buy them from.
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Old 01-28-2003, 02:04 PM   #9
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Which one is cheaper? If the hqi's are cheaper then the shortened life span might be a null issue, if they are more expensive, I would definitely go with mogul based...more frequent replacement and increased replacement cost for a little more intensity.... 8O
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Old 01-28-2003, 09:01 PM   #10
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Well, the decision has been made. My husband liked all he had been reading about the HQI's, he also liked the idea the ballasts were in the hood itself. He did find a supplier for the HQI bulbs that had them at roughly the same cost as the regular MH's. There was some concern over the quality of the ballasts at marine depot...so, I guess in about a week, we shall see if all the hoopla over this lighting is true...
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