Hi,
Welcome to Canreef.
Well, what do you want to keep ? Softies, LPS and/or SPS ? If it is something simple, then an overdrive of 2x or so will do -- like a couple of mushrooms, toadstool and etc. If you want a clam, SPS or other light loving corals, then you'll need to either rig your tank with more bulbs (like about 2 to 3) and overdrive them....or two 28W PCs. The great thing is that you really only have to buy one ballast to experiement with all of these scenarios - Workhorse 5.
To see examples of what other nano-reefers are doing to their < 15 gallon tanks for lighting, try this site :
http://www.nano-reef.com/members/index.html
Hope that helps.
- Victor.
[ 17 September 2002, 21:09: Message edited by: reefburnaby ]