Quote Originally Posted by kushman45
when one goes off the other goes on?

Exactly flipflop using only one ballast..............
okay, but you do understand that you will need a seperate igniter and capacitor for each bulb right? Well i would just use a 2 DPDT relay, hook up a single switch or timer on the coils, then hook the ballast the 120v of the ballast to one relay pole and the negative on the other relay, then run your lines out the relays like you'd normally do from the ballast to cap to igniter to bulb, then when the timer is on it will make the coils contact having voltage sent to one bulb and when it goes off it will open the coils sending the voltage to the other bulb. I hope you understand cause right now my MSvisio isnt working so i cant draw up a schematic
h3o Reviewed by h3o on . 2 room flipflop relay Hello all, new to this site it is full of great peeps and knowledge. I am a hardcore Do It Yourselfer. I am asking this community for some help. I am interested in building a 2 room 4 ballast 8 lamp flipflop relay system. These are super expensive from hydro shops like $400 just for the one I would like to build. I know it works with relays But they need to be strong enough to flip 1000 watt HPS systems. someone must have one and could possibly post pics then we could do a how to on building Rating: 5