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Old 12/23/2009, 12:23 PM   #1
StrategicReef
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light duration for this T5/MH?

How long would you run these lights growing acroporas?

2 ATI blue plus T5
2 175W iwasaki 15K SE on magnetic ballast and hammertone reflectors.

tank is 48" x 20" deep but actual water is not 20" deep.


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Old 12/24/2009, 10:20 AM   #2
OzarksReef
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T5's - 10-12 hrs per day
Halides - 6 hrs per day


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Old 12/24/2009, 01:26 PM   #3
LifeAquatic
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8 hrs a day for both lights.


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Old 12/24/2009, 01:33 PM   #4
JonnyD91
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T5 - 11am - 10 pm

MH 12pm - 7 or 8 pm

Shown for duration, actual times can vary.


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Old 12/29/2009, 12:32 AM   #5
StrategicReef
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The MH is very white and stimulate growth less color then if I get a 20k bulb.
So for the T5 if I run them longer, like 12 hours a day, would it show color more similar to having a 20k MH bulb because the coral has more blue light?


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Old 12/29/2009, 01:09 AM   #6
elijaher
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T5's - 8-10 hrs per day
Halides -5- 6 hrs per day
This way you don't have to change the light for a year maybe. Have lights hanging from 6-9 to nine inches from the water.


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Old 12/29/2009, 01:10 AM   #7
StrategicReef
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I was told to replace T5s and Halides every 6 months. but this doesn't really say how many hours the bulbs are run...


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Old 12/29/2009, 01:44 AM   #8
ksc
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That Iwasaki bulb will last for 2 years running 6 hours a day. Mines been running for a year with less than 5% drop in output. You could change out the t5's every 6 months or so as they will lose intensity pretty quickly, especially next to the halides due to heat.


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Old 12/29/2009, 06:09 AM   #9
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Just the facts please.

What little research has been done on optimal photoperiods seems to hint that anything over 11 or 12 hours may in fact hurt corals rather than help. I run my MH 10 hrs, and very weak actinics for 4 hours.


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