hps converison mh what the hell im confused????!!!!

i bought a grow light some time ago and now its time to change the bulbs as they are now old my ballast says 400w hps m59 on it this is were i get confused im trying to replace both bulbs and i dont know what on is the conversion bulb i think it is the mh plz HELP???


Also when i shop around on ebay for a new mh bulb none of them say if it is a conversion bulb so how do i know im purchessing the right one

google metal halide conversion. there's a shitload of them that come up. buy a 400w

you need to buy a 400w HPS sodium bulb or if you want a conversion bulb buy a metal halide conversion bulb that works with a HPS ballast.

You want a 360 watt mh to hps conversion bulb

Just search "MH conversion bulb" on Ebay. I know they're on there, because I've bought 'em before. HTG Supply has them for around $35.