That sounds alot like my bowl's dimensions, it should work well. I am currently using a Coralife Minimight (not familiar with CSL but if its the same I say go for it) 9 watt pc x2, 7700K daylight and actinic on the other 9 watt PC bulb/
your larger CSL versions may work better. If you can find a way to retrofit that other brighter light over your vase you may like it better. I am needing more light than comes from my minimight so I had to supplement with an extra palm light. My hammer extends so far that he shades others under him, so I hit them from the side with a few rays.
One of the things that puzzles me most about these small vessels is the slow rate of growth of the corals, which is good for us because we would hope we can get some good viewing time out of it before having to prune and relocate. the polyps are very colorful and extended well, so surely they are healthy considering how long they have been in here as well as the asexual reproduction going on (caulastreas, mushrooms, gsps, etc). Another factor Im not quite sure of may be my light limitations---it may be enough to sustain them happily but not like a big MH setup that runs them at their metabolic max and super-fast growth rates you guys get out of your larger systems. Thats one reason, maybe, why xenias and gsp havent taken over everything. So having said that, if you use larger lights you may get much quicker growth and more pruning maint., depending on how you stock.
pics Mike lemme see
Also, you may want to try some other design features. I would love to have less evap., but my purely airstone driven circ. system wont allow for that. What if you used a small pwrhd for your main circ., (75%) and a small airstone lightly driven (25% of circ. needs) to keep the airspace under your lid refreshed. You might get much less evap and still be able to meet your gas exchange needs for the inhabitants. Its well worth a try if you want, the only reason I havent yet is because I can't bring myself to take it all apart. The airstone system definately works, though, so that is reliable without risk. Be sure your ambient room temp is very stable, and with the right mini heater (6 inch/50-25w) you'll have no temp probs.
good luck Mike it will work just fine either way Ill bet.
b429