If you want to use the Stunners, you really should look into use the optional reflectors to make them more usable. They will reduce coverage some though. For a tank that size, a minimum of 4 would be needed I think. Going with a pair of Panoramas might be a more effective option, and would cost about the same, but with more usable light output. You could then use the Stunners to tweak the color as you needed. Just don't mount the strips flat against any surface so the heatsink is closed off. That heatsink needs airflow.