24G shallow glass box

[Delphinus]

Maybe the spectral output just isn't there in the lower wattages? Interesting, I agree, you'd think it would be OK given how local the light is. I'm betting it's a quality of light issue and not a quantity of light issue.

[Brent F]

Tony, You might have something there. The Viper 70 W comes with a 14,000K bulb while the Aqua-Medic 250 comes with a 10,000K bulb.

In both instances I was using just the MH light (no actinics)

[LeeR]

150w MH track light

http://www.cokerexpo.co.uk/seditpics/metal150wtl.jpg

2 of these 2' over the tank would be pretty cool looking.

would have to get better ballasts, bulbs and would have to find something like it in canada.

[LeeR]