Hi mate, they are Martin Roboscan 1016, and have 403w/24 metal halide bulbs with igniters, I guess at 403 watts. The bulbs are £350 each alone. I am not as clued up as you on the optics side, so am slightly unsure which will be best, and have just inherited them in a club I have taken over so never seen them in action, I would welcome your advise for the best results! I have tested all the supply's etc and they are working with power etc to all ignitors as they should. I just thought they needed new bulbs, and after discovering the cost realised why they were never fitted. I await your advise. Thanks. Alex.