I'm building a hood for a 29 gallon tank and would like to use three or four 24" flourescent tubes. Is their a significant advantage to using an electronic ballast, and if so, who manufactures these units, where can they be obtained, and what is a fair price? Thanks, Paul Paul Nicholson Electronic Imaging Systems, Inc. eis at altonet_com 5148 Commerce Avenue, Unit F TEL 805 532 1068 Moorpark, CA 93021 U.S.A. FAX 805 532 1065