Now to weigh in on the 24/0, 20/4, 18/6, issue. I have read the various articles and threads concerning light and dark periods. I believe the articles that I have read concerning 24/0 have used sound logic. Especially the notion that marijuana is in a class of plants that allows it to continually produce energy from sunlight(lighting) and constantly be "on" so to speak. I have seen this personally each winter when I place my true "Tropical" heliconia and ginger plants indoors and under 24hrs of fluorescent lighting. They appear to do great through the winter and are ready to explode in the spring when I place them back in the "wild" (outdoors). So I had toyed with running this grow on 24/0, but after a couple of weeks I shifted down to 20/4. The last few days as Amnesia #1 is stretching, I have been checking it at roughly 12 hour intervals for size. The last couple of days The initial measure each morning (just after lights on) is when I see the most dramatic growth. Last night for example, I measured the plant at approx 10:00pm and she stood at 14.5", this morning however at 8:30am she is sitting at 16+" . 24hrs ago it was at 14+" and had not really gained in size in the previous 24hr period. So as of right now I am seeing an every other day growth spurt, coinciding with watering days. I am feeding her approx 1L of fert water every other day and may actually need to increase this by another 1/2L to ensure she is satisfied. I may also start to introduce flowering nutes even though she is still in stretch. Just weak addition to what she is already getting. What say you all?