Hello tlranger and thank you so much for your time here. I'll go check under the leaves right away. I only had my plants under natural light in the beginning. Now they are under a 400W 5000K MH 24/7. However I am not sure, is one lamp enough for now or should I get another one? I have also heard that 24hrs makes no difference compared to 18hrs and so it is a waste of energy, is it true? Thanks!