While an iron core ballast is pretty simple, and even simple to build, consider this.......

If you spend anytime in your grow room or area consider a electronic ballast, if not for it's quite stealth then for its quiet to help with your mental health.

Electonic ballasts are much morer energy efficent (save 10-15% over iron core) but more important then anything, they are QUIET!
oldmac Reviewed by oldmac on . How about building a ballast? Hi everyone, first post, although I have been following the forums for some time. Has anyone considered building a hps or mh ballast?? I have been thinking about it, there really isn't much to them... a capacitor, transformer, igniter, and a socket. Has anyone tried to do this? Also... what about setting up one ballast to run two lights in parallel or in series? I have some experience with electricity but I am no expert. I am pretty sure I will build something in the near future, Rating: 5