First and very budget grow -Super Lemon

Plants are exploding in height, just fixed the lights to the ceiling and if they continue to grow on this rythm my room wont be able to handle it ^^ They are drinking a lot, and until time i figured how much water they needed the lower leaves fell off as a natural lack of care defoliation. Trichomes are starting to develop all trough the plant and it has a minor, but very delicious, candy and lemon smell.