See.. here's the thing w/ the eclipse system..
everything's jam packed into that good area (including the filter). And this poses a slight problem if you are not satisfied w/ low light conditions. Suppose you want medium/high lighting in the future.. then i would suppose the only way is to remove the two flourescent fixtures, purchase some power compact ballasts, sockets, and bulbs... perhaps even a three prong extension cord to do your own electrical wiring (meaning cut off the end of the extension cord, strip off 1/2" of the cord's insulator, identify the positive, negative, and ground wires, hook it up w/ your ballast. Then drill some holes to attach your ballast (on the outside) and sockets to your hood, and potentially some extra holes for ventilation since the power compacts produce quite a bit of heat. And even then, the new setup isn't perfect cuz we haven't waterproofed the sockets.
It sounds kinda complicated, but its do-able. I haven't had any electrical wiring experience before and all i did was consult the helpful employees at the local hardware shop.