Quote Originally Posted by Twitty
does the plug for the ballast look the same as a reg 120v or is it different. If it looks the same then it is possible that it is either 120 or 220. to find out look at the color of the wires going into the plug. standard code wire color for 120 volts is white for hot black for negative and green for ground and if its not those 3 its probbly 220

and if it iis 277 u could probbly run it through

220v no problem by just changin the plug

My ballast the common is yellow and the other is gray with yellow line on it it is 120vac and has 5 taps wires. with a red to the light and a yellow to the light.
litespeed Reviewed by litespeed on . Free lights!!! Ok, now that I have your attention . . . I have an opportunity to pick up some MH ballasts and base/socket assemlies from our old warehouse at work. They still work fine, just updated to high output flouro in that part of the building. The ballasts are all 400W Metal Halide, with a 220V hookup. Can these easily be converted to 120, and will a several year old ballast be worth it? The key motivator here is that they are free. Questions comments and snyde remarks welcome. Rating: 5