is the area do have HID lighting in your area ?? well i will suggest that you concat RUDD lighting co.
but if you are going to add some motion sensor you have to make a choice useing " Hi-Low " hid lighting system or go with T-8 or T-5 hi bay flourscent lighting they do work pretty well what i heard about it but the cost wise i dont have direct answer right now.
http://www.ruudlighting.com/ this is the link to the ruud lighting company they have pretty good slection of light fixures as well
i know there are few other motion sensors like Watt stopper also but unforetally i dont have the link for that one if someone have it please do put a link in here . thanks
Merci , Marc