400w Metal Halide Fixtures

[PRC]

I ran across a post on Craigslist today. A guy is selling a bunch of industrial Metal halide lights they are 400w. If I buy a couple of these cheap and change the bulb to a 400w 10k bulb (rather than 4k bulb) will this work for a 20g frag tank? Or is it too much?

 

[daugherty]

it is overkill unless you hang that light 2 or 3 ft above the tank

 

[Navarchus]

I agree with daugherty. I run 400s in my DT and need to introduce each new coral by putting it at the bottom of my tank, then slowly moving it up. If I don't do this, they get sunburned (which means they bleach)