Sorry to just jump in here, but i am fairly certain the reason you dont need to have a 2nd cap and ignitor is because they will automatically kick in when the relay is thrown to light the next bulb. In effect, the lamp knows when they need to be used. It is the same reason that when the power drops and comes back on, the light will relight without doing anything special.

The only reason there is a cool down period is for the bulb anyway. A properly run ballast that is cooled is more then capable of running 24/7.

I know we don't like to point to other pages, but here is a pretty darn good explanation

http://www.maximumyield.com/viewart.php?article=143
Bachelorpads Reviewed by Bachelorpads 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