The fixtures are home made, COBs are CXB3590. 4 COBs are on one heatsink for 200W total. In Veg, the COBs are all 5000K and in Bloom, they're placed alternating as 3000K - 3500K - 3000K - 3500K on each fixture. In veg they have a 5000K dedicated similar source at the lowest power & with no light...