Exactly what psycho described it saves on equipment you can have 2 flower rooms running with 1 ballast the flipflop flips the HPS Bulbs over using relay or contactors with a timer. You need a special type relay that can handle at least the inrush or inductive load at startup for 1000 watt HPS lamps. I know I could build this but i dont know what type of relay the retailers use. And I dont want to spend 400 dollars when this could be built for 150 to 200.................
kushman45 Reviewed by kushman45 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