u did ask if it would be as effective as a 400 watt. simply its a no... get a 400 watt sodium.. blow an 8-10" fan directly on it and if posss put an extractor on constant on ur closet out....... with a hole or 2 lower down on front or side to draw in air manually..

shame to see snow whites under envirolites i think. maybe in a SOG theyd be more efficiant....? seein as u chop the lower lot off.