Hey guys, gotta 29G saltwater with about 15 LBS of live rock and just got a hood on clearance for $5! I wanna get a power compact retrofit kit, but nothin' crazy. Just some live rock.Would you guys recommend this light: http://cgi.ebay.com/2-X-65-watt-Powe...QQcmdZViewItem
http://cgi.ebay.com/24-Aqualight-Ret...QQcmdZViewItem

Do these just screw on to my hood? Thanks!