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Old 02-12-2009, 03:17 PM   #1
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How many WATTS per gal?

I'm just wondering how many watts per gal you can have before it's considered too much.

Or is the more the better?

Is the watts per gal of a mh diff from a t5, as in 400w with each lights be the same ( besides the multiple t5s to acomplish the task).

Is that why people go with mh? To get a higher wattage with 1 bulb?

I'm just curious at this point and have been looking at mh for in the future of my tank.

Thanks
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Old 02-12-2009, 03:19 PM   #2
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I would say anywhere from 4-6 watts per gallon. Depending on what you have in your system.
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Old 02-12-2009, 03:20 PM   #3
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guess your asking how much is too much on a sw tank?
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Old 02-12-2009, 03:49 PM   #4
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Yes, sw reef tank.
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Old 02-12-2009, 06:11 PM   #5
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No people go with the MH`s and t5`s because of their higher intensity. WPG is a broad and general guidline. In today`s lighting intensity and par are terms used.
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Old 02-15-2009, 01:53 AM   #6
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there is 10k, 15k, 20k, 6500k.
how does a person know which one they want to get?

do you want a variety of them all?

when you say to keep the lighting down to 6-7 hours, does that mean all lights so the tank is dark or just the main mh or t5's then leave some other light like florescents or something on.

sorry for all the ?'s, I'm really trying to figure out the whole lighting thing.
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Old 02-15-2009, 02:05 AM   #7
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I have 4' 120g tank. Right now I have dual 175w MH bulbs with dual 110w VHOs and 2x54w T5s = 678W of light. I just picked up 2 250w MH ballast that will replace the 175s so I will be up to 828w of light.

My MHs are on for 8 hours per day, left on then right on left off then right off. My T5s and VHOs are on for 11 hours per day. Sunrise and sunset effect. I'm gonig to reduce the MH period when I put the 250s on to probably 6-7 hours. Not sure yet.
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Old 02-15-2009, 02:05 PM   #8
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Thanks Ziggy,
That puts the lighting in perspective for me.

Then the type of bulb used (10,15,20,ect.) is more of a personal preference?
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Old 02-15-2009, 02:16 PM   #9
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What I believe is that the lower k value, the more yellow the light. The higher the k the more blue the light looks. The middle k values give you a very white look. That is why you supplement the mh with vho or t-5s so you can add actinic blue to the mix. If that is wrong someone correct me please...
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Old 02-15-2009, 02:58 PM   #10
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Thincat you are correct.

I use 10,000K bulbs on my reef and frag system so I can get good growth. I've used several others and didn't like the look. So what color temp you use is up to you and what you like your tank looking like.
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