Are you saying you can put a conversion bulb [MH] into an ordinary HPS ballast??

I thought it was the Ballast that needed to be the special conversion type .i.e..A Conversion ballast that can take either an MH or HPS bulb?

???

Please can someone clear this up for me coz it could be dangerous !
Easy Roller Reviewed by Easy Roller on . Mh conervsion bulb runnin on hps ballast so if im correct you can run a 400w mh conversion bulb on a 400w hps grow light system with a ballast??? this is what im thinkin about buying...will it work ok??? http://cgi.ebay.com/400W-HPS-MH-CONVERSION-Bat-Wing-Grow-Light_W0QQitemZ7755230101QQcategoryZ42225QQrdZ1QQcmdZViewItem Rating: 5