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#1
02-09-2011, 05:07 AM
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SPS, MH and bulb distance
I can't find the poll/thread from years ago, so thought I'd revisit this.
for those running MH over SPS tanks, what distance are your bulbs from the water?
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Brad 
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#4
02-09-2011, 06:51 AM
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I'll have to measure to be sure since it's been a while since I hung the lights and I don't remember but my goal was 12" for the lamps (not the bottom of the reflectors but the bulbs themselves). Wanted a little more height for a couple reasons: reaching in with a hand without burning my elbow, heat mitigation, and better coverage/less shadows/less-straight-up-and-down-angles so that corals have some hope of side lighting since before with lamps closer to the surface I always had corals dieing out at the bottom and I really want to avoid that with this tank. I forget but there was a fellow out east with a similar sized tank to my own (was big on reefescape.ca when that board was still around) who went 12" and I sort of modeled my lights after his tank.
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-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#5
02-09-2011, 06:59 AM
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I've got a 250W Coralife about 4" above the water of my 40g, though I would like to raise it up a couple of inches to get better coverage (square tank).
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#6
02-09-2011, 02:09 PM
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I have my lights within 5" if the water surface...
I run 2 HQI 250W halides and sometimes I think the light is too intense in the topo half of my 24" deep tank as I often have new corals bleach out even if they came from a comparably lit tank. I have been contemplating moving them up to around 8" off the water surface. Looking forward to more hobbyist input here.
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