some facts to help you decide:
minimum light for good bud - 3,000 lumens per square foot
recommended light - 7,000 to 10,000 lumens per square foot
250 watt light is appr. 40,000 lumens = 4,000 lumens per square foot
400 watt light is appr. 60,000 lumens = 6,000 lumens per...