Ok.. so I've built a secret room... its 5m x 5m.. so 25sqm in total.. or 225sq ft At first I'm not going to use the whole room.. just 3 6x2ft trays so a total of 36sqft of grow trays The walls will have reflective mylar, ceilings are white reflective... the question is this... Do I work out the lighting on the room size or the grow size? if its room size I'm in trouble as I've been told to work on 50w per sq ft however I will be using LED lights 225 sq ft x 50watt = 11kw of lighting !!! 36 sq ft x 50watt = 1.8kw.. Help !!!