Originally Posted by tawolcott
Even if you could get it drilled with enough holes to support the airflow you couldn't rest a light fixture on it after that anyway....
Unless it's a normal output fluorescent - which it isn't since we're talking Satellite CFs - you don't want to rest the fixture right on the glass anyway. The heat from even just the CF
bulbs will eventually crack/break the glass. THEN, not only do you have glass in the tank, but your light fixture. At that point, the glass in the tank is the least of your issues.
Whatever your covering of choice, use legs on the fixture and support it off your tank frame.