Night time boarding on Bullards Bar

We are going to be heading to bullards bar this weekend. We have been going there for years and we have seen people doing night time boarding. This is the first time we will be there since getting into boarding. We just got a boat with the tower and tower lights so we started thinking about trying this ourselves. Does any one know the rules/laws/regulations that surround this? My understanding form a local boat shop that boarding at night is legal but not with the tower lights on because they are considered docking lights. It seems the whole purpose of tower lights is for at night time.