I keep talking about increasing the dark period for bloom rather than decreasing the light period. This is because I believe that the plant is reponding to a longer night more than a shorter day (although both periods are important to the plant). I ran an experiment once with "ahemeral" light cycles. Hemeral = 24 hour day. Ahermeral = not 24-hour day. My experiment kept my light period at 24 hours, but increased the dark period. So instead of going 24/0, 20/4, 18/6, etc, I went 24/0, 24/4. 24/8, etc. The plants kicked into bud at about 24/8. They were confused little girls though, and after a couple of clone cycles through this experiment, I had a disproportionate number of hermies and males develop. Also, they seemed to want to continue veg growth along with the bud growth. I ended up with large, tight, over-leafy buds with poor thc development and a lot of clorophyl. They went throug the "Prepetual Motion Goodness Extractor" I described in another thread and made good hash though . . . .