I've had several friends stop by and mention I should use the tank or at least the overspill from the lights to grow something. I just laugh.
I love that you mention Progressive Reef, I've been there a number of times and am always fascinated at how complex it can be to grow tomatoes. They've got some really neat setups in there and I'm always trying to figure out how I can apply them to reefing (ahem, I mean saltwater fish tanks
).