I have seen the flip flops but I dont really have a need for one ever.I have multiple light setup and none of my grow areas are close to each other so I wouldnt have any use for it.I use digital switchable ballast so no real need for it. I know some people trying the new dutch method of alternating spaced lights where you have like 8-10 lights then you use flip flops to control the lights so only 5 are on at any one time they switch every other hour and the lights are setup in a pattern so you get overlap this way you cover twice as much are but use half the power. Just toy have a single flip flop isnt worth the money to me as I could get a whole second 600 watt setup for half the price of the flip flop
I understand but the flip flop method Im talking about is different.
The one Im referring to can work with 2-6 (or whatever) bulbs per room timed by the same timer,now that's maximizing your ballasts power.
With the two-4-two your energy spike will drop from 27/amps every time you turn those bad boys on,to 7/amps every time the power is relayed from room to room.
I put some examples below. This will cause for the end grower to have two grow rooms but at different interval's.