View Full Version : Lights for myMarine Land 70G cube

12/20/2009, 08:54 AM
I started of with a single 250watt 14k SE pendant with no supplemental lights, but quickly realized it was not enough light. I have a mixed tank SPS, LPS, and softies. I would like to one day but a nice clam in there as well. Question is what lighting to get. I have placed my 48" dual 250 over the tank for the time being, still have some shadows over the corners and back, I think that because the way the light hit the tank, reflectors are at the edge of the tank. I want a nice even coverage from front to back, what lights would you guys and gals recommend, Can I ever consider a T5 setup
This is what i was looking at (http://www.marinedepot.com/36_inch_6x39W_Sunlight_Supply_Tek_Light_High_Output_Fluorescent_Lighting_Fixture_36_Inch_T5_Fluoresc ent_Light_Fixtures-Sunlight_Supply_Inc-SL2111-FILTFIT56U-SL2115-vi.html)
Tank dimensions are 30 x 30 x 18

12/20/2009, 11:58 AM
A 6 bulb fixture is not going to be enough light for a tank with 30" depth, unless you have all your corals far away from the glass front and back. Your going to get a lot of oversplash of light using a 36" fixture on a 30" wide tank too. The problem is nobody makes a 30" T5 fixure that I know of. ATI makes a 8 and 10 bulb 24" T5 fixure that would be plenty of light but it's pricey, check it out here (http://www.reefgeek.com/lighting/T5_Fluorescent/ATI/Powermodule_Fixtures/). Kind of a hard tank to light with T5's without using 2 fixtures or spending a ton of cash on a Powermodule. What reflector were you using with your single 250W? You could always switch to a 400W with a Lumerarc large, should be plenty of light.

12/20/2009, 12:35 PM
Tank is only 18" deep, I think what I will end up doing, is making a hood and taking apart my 48" fixture, put everything in the hood from the fixture and get exactly what I want and still have that 7-10 watts per gallon I need for my corals, Plus I can stager the lights to get the even coverage I’m looking for.

12/20/2009, 03:38 PM
Just FYI, watts per gallon is BS. I'm using a 6 bulb Powermodule over my 90G, it's324 watts so about 3 and half watts per gallon. My LPS hate this light and my SPS have been growing like weeds. It's all about good reflectors and keeping the bulbs cool. I think 500-700 watts over a 70 gallon may be a bit much. It may be tough keeping your tank cool with that much light too.

12/20/2009, 03:41 PM
1 250mh would work fine on that tank with a good reflector.