i have 2 of these hoods, but only use them at 600watts,
any hood/tube that has glass diminishes yield, i know this first hand.
cool tubes are garbage, i swapped 3x 600w tubes for 2x magnum xxl, and the xxl blew the tubes out of the water.
my space is 4x8ft by 6ft high, (1.2x2.4x2m tent)
if you...