PDA

View Full Version : Which light for my MH ballast


carpet1
03/15/2011, 12:01 PM
I have a new FPO ballast rated for a 400w MH bulb. I have never assembled a MH fixture, so my question is simple. Do I have to use a 400w bulb, or can I drop down to a 250w without hurting anything? My ballast will handle either double-ended or mogul bulbs

nanojg
03/15/2011, 12:12 PM
you must use a 400 watt bulb