D dbo24242 New Member Mar 5, 2009 #2 you have to buy what is referred to as a conversion bulb. a conversion bulb is made so that it will work in a different fixture. so you want a metal halide conversion bulb for high pressure sodium ballast.
you have to buy what is referred to as a conversion bulb. a conversion bulb is made so that it will work in a different fixture. so you want a metal halide conversion bulb for high pressure sodium ballast.
