Flip Box - Light switch - 4 ballasts/8 lights (Arapahoe & Liverpool) $90

I've got an LSM-8 FLIPBOX by POWERBOX, you can run eight lights with four ballasts and double your production. The LSM-8 FLIPBOX is a multi-ballast light switching module that allows each ballast to run two separate lights - one at a time - by switc ...

from Classifieds https://denver.craigslist.org/grd/d/aurora-flip-box-light-switch-4-ballasts/6795015828.html