4 ballast flipbox schematic

Hi guys. Ive looked around and can't dind anything on this. I would like to build a 4 ballast "Flip Box". I wanna run eight 1000w HPS lights off four ballasts, on a 12/12 shift. I understand I can build a flip box that can do this, using one timer, four ballasts and (eight ?) relays?

Can someone make me an easy to read schematic, or point me out to one for such a thing?

thanks for now,

ginnzy.

Cheapest way is to get yourself 4 double pole relays. 120vac coil with contacts rated for 12a. On the relay your ballast wires that go to the lamp go on the relays common terminals, light one will go to the normally open contacts then light two will go to the normally closed contacts, yourtimer is wired to energize the coil. Parralel your coil wires to all the relays. Simple.

Thanks! That doesn't sound too difficult.