Just to update everyone...this won't be much of a test this time around....My bro wasn't paying attention to his SOIL ph and when he called me over to figure out what was wrong with his plants, some of the soil Ph readings were all the way down to 4.8. Needless to say, this has screwed his grow up to the max and he will probably have to start over with his new light and a lesson learned the hard way...Ck the ph of everything, every time! I have had no such problems and thus, my weed under the 1000w is blowing his away. We will try this again however!