4x4x6.5 flowering space. 400W or 600W?

yup +rep from me 2 for wanting to learn

general : 400watt = 2ft X 2ft. 600watt = 3ft X 3ft. 1000watt=4ft X4ft......but i whould go with the 600 and get a other one when u get the dough...i have used both a 1000 watt and a two 600watts in a 4x4 area and the 600's rocked!!....the key is the reflecter. dont skimp on the reflecter. keep the glass and bulbs clean EVERY WEEK and youll be happy...

Will do. Dank you!