cvause,
I did one several years ago. It has had everything from 7S to 10S ...... see the thread:
http://www.rcgroups.com/forums/showt...light=Venus+II
If I were doing it today. Power 110 (or similar 300 KV outrunner) 8S Zippy Rhino 3700 (2-4S packs in series) , Jeti Advance Opto 77 (or equivalent) and a 17x10 APC-E prop. Expect it to weigh approximately 9.5 lbs and make 2000 watts.
Ed