I am actually in the planning process for a 125 canopy. I am going to stagger 4 ft bulbs (I think). What are you wanting to have in the tank? Specifically are you looking for info on how to build the whole thing (wooden case, wiring end caps and ballast)? If not, you could mount a shop light in a wooden box?
i have 2 30" power compacts that i'd like to keep either on the current glass tops or have mounted onto the canopy itself. in the illustrations you provided, i'm looking for specs for option b. as for electrical wiring, i'm no electrician and having enough space for a power strip and some timers is all i'm looking for.