My last trailer was all LED lighting so I did not need an isolator ( 02 FLH) for the trailer lights. I just brought a used (05) Bushtec turbo II with standard bulbs, and would like to stay with LED lighting. Bushtec makes a conversion kit for it or there is the option of replacing the standard bulbs with LED replacements. Has anybody here done either? Pluses or minuses ( other than the bulbs being a cheaper option) to either? Would just changing the bulbs be a lower enough draw to not effect the turn/brake/running lights on the bike itself?