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Old 12-16-2011, 09:16 AM   #1
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light help

hi i have a question about lights.. if for example i had a number of t5 lights and the total watts of these were say 150watts. if i had metal halide and that to was 150watts would the outcome be the same so what iam asking is does it matter what light types are running as long as the watts are the same. apart from having a lot more t5 tubes i know
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Old 12-16-2011, 09:34 AM   #2
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No the watts might be the same but the intensity will not be the same. Itensity or PAR would be more on the MH`s than the T5HO but the T5HO are not a bad choice. This will help you with the differences

Aquarium Lighting Selection Guide: Which Aquarium Lighting System is Right for You?
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Old 12-16-2011, 09:34 AM   #3
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I like the t5 lighting myself. The watts dont really equate to each other in my opinion. You could have a top of the line t5 setup with individual reflectors and great bulbs that can put perform a metal halide of the same wattage.

I was using a 150watt clip on MH fixture and much prefer the 96 watts of T5 lighting I now use.

What size tank are you trying to light and what are you wanting to keep under the light?
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Old 12-16-2011, 09:47 AM   #4
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i have a 125l tank its still in early stages but i want to keep a viraity of corals and maybe nems. the tank is 80cm in lenght so id need something that would fit. also like i say my tank is 80cm lengh so if i get a 60cm light unit that would make a 10cm gap at each end would this matter iam thinking because there would be 2 dark spots at each end. so can anyone recomend any light systems.. so its not the watts i need to keep in mind.. is it the intensity and what is this measured in
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Old 12-16-2011, 10:46 AM   #5
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Try this out

Lighting the Reef Tank: A Primer for Beginners by Doug Wojtczak - Reefkeeping.com
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Old 12-16-2011, 11:45 AM   #6
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thank you
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Old 12-16-2011, 08:00 PM   #7
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how old is that article? that's got some outdated information in it IMO/IME. as carey stated, i've seen higher PAR numbers out of some T5 fixtures than equal or greater wattage halide fixtures.
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Old 12-16-2011, 08:51 PM   #8
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so is t5 the way then in your opinion also please help me. My tank is 80cm across and 18inch deep id like to keep a nem Whats the min light id need
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Old 12-16-2011, 09:25 PM   #9
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i would use at least a 4 lamp 36" t5HO fixture with ATI lamps.. i would prefer 6 lamps. different equipment for different applications. for your application, i would go with t5.
if you had a 24" cube, i would use a halide.
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Old 12-17-2011, 06:42 AM   #10
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so would the 4 36 t5s be ok for nems
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