View Full Version : Metal Halide, hours per day
IndyReefMan
02/15/2007, 03:15 PM
For those reefers who supplement their metal halide lights with 10-13 hours per day of actinic lighting, how many hours per day do you run your metal halide lights?
rustybucket145
02/15/2007, 03:42 PM
12 on 12 off for me. I cut it back in the summer b/c of my heat issue, but if it weren't for the heat I'd keep 'em on 12 year round.
Actinics (VHO) on 14hrs/day
IndyReefMan
02/17/2007, 04:52 PM
^^^
xenon
02/17/2007, 06:22 PM
<a href=showthread.php?s=&postid=9250927#post9250927 target=_blank>Originally posted</a> by rustybucket145
12 on 12 off for me. I cut it back in the summer b/c of my heat issue, but if it weren't for the heat I'd keep 'em on 12 year round.
Actinics (VHO) on 14hrs/day
WOW thats a long time.
Any reason why you run it that long?
I do 12hrs actinics and 8hrs MH.
davocean
02/17/2007, 06:33 PM
I also do 12 actinic and 8 MH.
eidillitih
02/17/2007, 06:43 PM
<a href=showthread.php?s=&postid=9267713#post9267713 target=_blank>Originally posted</a> by davocean
I also do 12 actinic and 8 MH.
same here
6.5hrs MH and 13hrs actinic VHOs. i got better and better coloration of coral each time i cut back on my MH time. i started at 9 a day, then 8, then 7, now 6.5. in summer it's 6.
FishMachine
02/17/2007, 07:12 PM
7 hours is what i plan for my 60 reef
AquaReeferMan
02/17/2007, 07:27 PM
<a href=showthread.php?s=&postid=9267713#post9267713 target=_blank>Originally posted</a> by davocean
I also do 12 actinic and 8 MH.
Yep same here.
IndyReefMan
02/19/2007, 05:32 PM
^^^
JokerGirl
02/19/2007, 08:06 PM
^^^^^
funman1
02/19/2007, 08:20 PM
<a href=showthread.php?s=&postid=9267648#post9267648 target=_blank>Originally posted</a> by xenon
Any reason why you run it that long?
I run mine for 13.5 hours per day. I get insane coral growth.
Fish don't seem to care.
hyperfocal
02/20/2007, 10:00 AM
I run MH for about 11 hours a day. Mostly for aesthetic reasons.
miatawnt2b
02/20/2007, 10:09 AM
I was reading a nice long post the other day about short halide photoperiods. Seems like a good way to go. I just switched to halides from t5's, and I am running halides for 5 hours, actinics for 1 hour before and 1 hour after.
-J
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