Absolutely! The rule of thumb is "50watts of HID lights (MH or HPS) per square foot of growing space". So, 32 sq. ft. is dead on! Actually, you will be getting "better" coverage from 4, seperated, light sources than you would from a, theorhetical, single "1,6oo"watt light source because the light only has to travel about half as far, don't forget about "The Inverse Square Law".so the 1600watts would be adequate for 4'x8'