Short in my fixture from spitting fish...

[Binare]

I use workhorse ballasts along with GE 10k bulbs.

The GE bulbs are rated at 25,000 hours lifespan. and are 95% efficient at 40% of there lifespan.

I run my lamps 10 hours a day, which works out to a 2500 day life span (average) or almost 7 years. Take into effect the efficiency (95%@40%) and I change em roughly every 3 years or so.

They cost me about 3-4 bucks a piece. 17 bucks per ballast.

[banditpowdercoat]

Originally Posted by Binare

I use workhorse ballasts along with GE 10k bulbs.

The GE bulbs are rated at 25,000 hours lifespan. and are 95% efficient at 40% of there lifespan.

I run my lamps 10 hours a day, which works out to a 2500 day life span (average) or almost 7 years. Take into effect the efficiency (95%@40%) and I change em roughly every 3 years or so.

They cost me about 3-4 bucks a piece. 17 bucks per ballast.

4 x 39W on a 12g?

[Binare]

That is correct

[banditpowdercoat]

That would equate to 1560w on a 120g!!!!!!!!!

[Binare]

hardly, would not be adding up like that.

depth has more to do with anything then full volume. thats why watts per gallon is pretty useless as a measurement.

my tank is 3' long and 8" deep, I can grow just about anything without worrying about depth. If this light was say over a 40 breeder which is twice as high, would you be growing sps on the bottom of the tank? by growing I mean thriving, not just living.

[banditpowdercoat]

Got any pics of your tank?

[Binare]

ill post up pics in the build section n let ya know. be awhile yet... this little tank just got finished building 2 months ago, this is replacing a 10" deep by 4' long that decided to **** all over my floor.