Looks like my HLG 100 V2 lights are 200 watts; 120 volts; so:
200/120 = 1.67 amps.
So with 4 of them I'm only pulling 6.68 amps. Outlets are normally 15 or 20 amps.
All of my outlet circuits are on 20 amp breakers; lighting and smoke detectors are on 15 amp breakers - but I've redone most of the wiring in my house as I renovate.