My buddy is currently running 4k at 220v off a cap 4x lighting controller...orange power wire into double 30 breaker...200 amp service....been running it for over a year...the other day he plugged in a space heater into a totally differnt outlet/differnt circuit on the other side of the house when 2 of his ballasts blew and tripped the breaker....he replaced fuse's on ballast and they keep blowing...out of no where!! he order a new nanolux ballast and sadly enough it keeps doing the same thing....it actually sparked inside the ballast and was scary....i narrowed the problem down to either the cap 4x because the 2 that are working are on the left recepticle....or bad bulbs/ or light socket to ballast problem....i tried to plug in the light socket wire to the ballast that was working and it didnt fire...going to get a electrican to look at but any input would help!!thanks farmers...feel free to chime in with questions!!