Lighting for 20 tall

Is a 250 watt MH too much, or should I keep using my pc light fixture?
Just got a free 20t going to make the 20l a sump ;D

 

What type of coral are you planning on keeping.

 

mostly zoas but a mix of all is what I want will this be too much light for a 20t?

 

Hey BrianJ. At almost 17" tall, I'm not sure if a 250W halide would be too much. With a water volume so slight, and such a shallow tank, my main concern would be heat. IMO it's pretty darn hard to have "too much" light, but you have to be careful in the application of the light. If the bulb was far enough away, you might get by without a chiller, but unless it's a pretty well-made pendant, it would be tough lighting just the tank (and not the rest of the room) with a single 250W bulb placed a bit of distance from the water's surface.

I'm looking forward to some more opinions on this one. FWIW, if it were me, I might go with a 150W pendant for that size tank. Less potential issues to be worried about.

 

I agree. Less heat problems, easier to find a decent pendant for the size and less electric bill to top it off.