Your light level

Basile · 08-25-2009, 10:50 AM

I'm just wondering about my light level. I was working in the tank and had to lift my Aquamedic to have enough room to reach the bottom; mine being 24" deep. I left it like that even after, and notice my temp spike was less and this is my question, what level is your MH or light at. Mine are usually at 6" above, but now they're at 8" and i see a difference in heat transfer to my tank. So what do you thing the level of the fixture could be without compremising the light efficiency.

SneakyOwner · 08-25-2009, 11:00 AM

Mine are probably about 4" off the top of the water. I have a chiller so I don't really care about temps and the tank is 32" deep so it needs to be lower.

Basile · 08-25-2009, 11:05 AM

Quote:

Originally Posted by SneakyOwner

Mine are probably about 4" off the top of the water. I have a chiller so I don't really care about temps and the tank is 32" deep so it needs to be lower.

Wow must need lots of top off. whats your tank spec?

seafansar · 08-26-2009, 09:13 PM

I have an outer orbit fixture with 3-250W MH and 8 T-5's over my tank. I used the legs that came with it to stand it on my tank, so it's about 4" above the water. The water stays pretty cool, I'm guessing form the mesh tops. I have about 1 to 1.5 gallons of evaporation per day.

DendroGuru · 09-07-2009, 12:00 AM

i've got a 6 gallon with a jbj viper 70 watt clip on. i think that is more then enough light for my coral.

Jeremy0322 · 09-07-2009, 11:19 AM

I have never used MH lighting, but most people like to run them somewhere around the 6 inch mark. As long as there is a shield on the light itself you will be fine, but if its an open bulb you run the risk of blowing it up. Do you have fans that run over the top of the tank?

faust · 09-07-2009, 12:38 PM

Quote:

Originally Posted by seafansar

I have an outer orbit fixture with 3-250W MH and 8 T-5's over my tank. I used the legs that came with it to stand it on my tank, so it's about 4" above the water. The water stays pretty cool, I'm guessing form the mesh tops. I have about 1 to 1.5 gallons of evaporation per day.

about the same

ngocturnal · 09-25-2009, 05:22 AM

I just got a pico and I'm also checking out JBJ Viper 70w. How's that working for you DendroGuru?

Also, let me know if anyone passing by here has a used one, I would be interested in buying it. Thanks

Jeremy0322 · 09-25-2009, 12:37 PM

Quote:

Originally Posted by ngocturnal

I just got a pico and I'm also checking out JBJ Viper 70w. How's that working for you DendroGuru?

Also, let me know if anyone passing by here has a used one, I would be interested in buying it. Thanks

You might want to check the for sale/trade sections around the forums, you can find one for pretty cheap I would assume. Now trying to thread jack either but you are going to use a 70 watt MH on something in the pico range? What size tank, that may be a bad bad idea haha

seafansar · 09-25-2009, 06:57 PM

I have a 20" 150W MH SunPod over my 10 gallon frag tank. It's an open top and doesn't really seem to heat up the water at all for some reason.

View Poll Results: What level do you have your MH fixture at
6 "	7	14.89%
8"	7	14.89%
4"	4	8.51%
10"	5	10.64%
none of the above , got T5 at......	24	51.06%
Voters: 47. You may not vote on this poll

08-25-2009, 10:50 AM	#1 (permalink)
Basile Golden Moray Join Date: Aug 2008 Location: Gatineau/Ottawa canada Posts: 2,021 View Gallery Karma Komment Add yours!	Your light level I'm just wondering about my light level. I was working in the tank and had to lift my Aquamedic to have enough room to reach the bottom; mine being 24" deep. I left it like that even after, and notice my temp spike was less and this is my question, what level is your MH or light at. Mine are usually at 6" above, but now they're at 8" and i see a difference in heat transfer to my tank. So what do you thing the level of the fixture could be without compremising the light efficiency. __________________ My Rockwork Macroalgae Club. My slow 65 g build up Combination fish and Anemone 65g- Aquamedic 2X250wMH-T5 -Recirculating Octopus 150DNW- 2X Vortech Mp40W gen2 powerheads-Eheim 1262 910GPH return - Little fishes Carbon&Phosban reactors,GHL controllers and Dosing pump and ME!

08-25-2009, 11:00 AM	#2 (permalink)
SneakyOwner Midas Blenny Join Date: Dec 2007 Posts: 90 View Gallery Karma Komment	Re: Your light level Mine are probably about 4" off the top of the water. I have a chiller so I don't really care about temps and the tank is 32" deep so it needs to be lower.

08-26-2009, 09:13 PM	#4 (permalink)
seafansar Elegance coral Join Date: Apr 2008 Location: Deltona, FL Posts: 1,184 View Gallery Karma Komment	Re: Your light level I have an outer orbit fixture with 3-250W MH and 8 T-5's over my tank. I used the legs that came with it to stand it on my tank, so it's about 4" above the water. The water stays pretty cool, I'm guessing form the mesh tops. I have about 1 to 1.5 gallons of evaporation per day. __________________ -Sara SW since Jan. '08 150 gallon SPS reef 20 gallon BTA/clown tank 90 gallon bowfront mixed reef 45 gallon cube 150 tank thread 45 cube thread My Reefnook

09-07-2009, 12:00 AM	#5 (permalink)
DendroGuru Fire Coral Join Date: Oct 2008 Posts: 60 View Gallery Karma Komment	Re: Your light level i've got a 6 gallon with a jbj viper 70 watt clip on. i think that is more then enough light for my coral.

09-07-2009, 11:19 AM	#6 (permalink)
Jeremy0322 Tridacna maxima Join Date: Mar 2008 Location: Wilmington, NC Posts: 4,753 View Gallery Karma Komment	Re: Your light level I have never used MH lighting, but most people like to run them somewhere around the 6 inch mark. As long as there is a shield on the light itself you will be fine, but if its an open bulb you run the risk of blowing it up. Do you have fans that run over the top of the tank? __________________ UNCW 2011 -Marine Biology Major -Oceanography Minor The old 90 Gallon Build r.i.p Only after the last tree's cut And the last river poisoned Only after the last fish is caught Will you find that money cannot be eaten....

09-25-2009, 05:22 AM	#8 (permalink)
ngocturnal Tunicate Join Date: Sep 2009 Posts: 4 View Gallery Karma Komment	Re: Your light level I just got a pico and I'm also checking out JBJ Viper 70w. How's that working for you DendroGuru? Also, let me know if anyone passing by here has a used one, I would be interested in buying it. Thanks

09-25-2009, 06:57 PM	#10 (permalink)
seafansar Elegance coral Join Date: Apr 2008 Location: Deltona, FL Posts: 1,184 View Gallery Karma Komment	Re: Your light level I have a 20" 150W MH SunPod over my 10 gallon frag tank. It's an open top and doesn't really seem to heat up the water at all for some reason. __________________ -Sara SW since Jan. '08 150 gallon SPS reef 20 gallon BTA/clown tank 90 gallon bowfront mixed reef 45 gallon cube 150 tank thread 45 cube thread My Reefnook

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)