To much lighting?

ReefFreek917 · 10/23/2008, 07:20 AM

Just wanted to get some thoughts. I have a standard 75 with a custom canopy that I built. The inside of the canopy is lined completely with reflective flashing. I have 2 single ended 400W MH with 20K bulbs. I know 20k's do not foster much growth so I am thinking about putting in 14Ks. Would that be to much lighting for my tank? I have had problems with bleaching before but have found putting new corals under overhangs in my LR for a couple of weeks helps with the problem. LMK what ya think.

kolosy · 10/23/2008, 08:20 AM

800w for 75G? um.. yeah. unless it's really deep. and even then... that's a bit much.

tigerarmy40 · 10/23/2008, 08:24 AM

thats fine!

boxerzz · 10/23/2008, 08:25 AM

I think that is too much light for a 75 g.

m3fan8ic · 10/23/2008, 08:42 AM

you will be ok with 2 174 MHs on std 75gl which I had before, 2 250w MH at 14k is just perfect on keeping any corals. 2 400w mh is a over kill. It will generate alot of head inside the canopy and 14k will have deeper par then 20ks. I would go with 250k or keep the 20ks if you decide to stick with 400w

ReefFreek917 · 10/23/2008, 12:08 PM

I realize 800W's it alot of lighting. I would not have that much other than the fact that I got a heck of a deal on the ballasts and moguls. The heat thing isn't a problem. I have large fans and the temp in my tank stays at about 78. Other than heat and bleaching I haven't read much about having that many watts per gallon. Anybody know other consequences?

10/23/2008, 07:20 AM	#1
ReefFreek917 Moved On Join Date: May 2008 Location: Joplin, mo Posts: 95	To much lighting? Just wanted to get some thoughts. I have a standard 75 with a custom canopy that I built. The inside of the canopy is lined completely with reflective flashing. I have 2 single ended 400W MH with 20K bulbs. I know 20k's do not foster much growth so I am thinking about putting in 14Ks. Would that be to much lighting for my tank? I have had problems with bleaching before but have found putting new corals under overhangs in my LR for a couple of weeks helps with the problem. LMK what ya think.

10/23/2008, 08:20 AM	#2
kolosy Registered Member Join Date: May 2008 Location: chicago Posts: 655	800w for 75G? um.. yeah. unless it's really deep. and even then... that's a bit much. __________________ not yet. maybe someday. Current Tank Info: 90L RR mixed reef, panworld 150ps external pump, t5/mh/led, 20g under-tank sump, 27g above tank sump, 27g fuge with 4" dsb, macro and lr rubble.

10/23/2008, 08:24 AM	#3
tigerarmy40 Registered Member Join Date: Dec 2004 Location: central ca Posts: 1,831	thats fine! __________________ The power of moonlight Current Tank Info: 90g rimless tank in the makes and a 15g nano

10/23/2008, 08:25 AM	#4
boxerzz Registered Member Join Date: Jun 2007 Posts: 606	I think that is too much light for a 75 g.

10/23/2008, 08:42 AM	#5
m3fan8ic Registered Member Join Date: Oct 2007 Location: N.VA Posts: 52	you will be ok with 2 174 MHs on std 75gl which I had before, 2 250w MH at 14k is just perfect on keeping any corals. 2 400w mh is a over kill. It will generate alot of head inside the canopy and 14k will have deeper par then 20ks. I would go with 250k or keep the 20ks if you decide to stick with 400w

10/23/2008, 12:08 PM	#6
ReefFreek917 Moved On Join Date: May 2008 Location: Joplin, mo Posts: 95	I realize 800W's it alot of lighting. I would not have that much other than the fact that I got a heck of a deal on the ballasts and moguls. The heat thing isn't a problem. I have large fans and the temp in my tank stays at about 78. Other than heat and bleaching I haven't read much about having that many watts per gallon. Anybody know other consequences?