usa 120v
europe 240v
your ballast runs cooler on a 240v thats about it.
never heard hps magnifies?
karmaxul Reviewed by karmaxul on . Quick Lighting Question, Please Help!! Ok Im New Here but i been doing my research for a while and seen all the different lighting options for veg growth as well as Flowering Stage. I've Decided to go with H.I.D. but like most people im looking for the best buy in Dual MH / HPS 400W. I Seen that they make Conversion Bulbs like a MH conversion bulb that works in a HPS Ballast and Vise Versa, I will be growing 4-5 plants and wanted to know if it makes a difference in whitch should be my primary light if i get the conversion bulb? I Rating: 5