God damn it, I'm searching for research on plants and light cycles for greenhouse use. I searched, "plants light cycle 2 hours light 2 hours dark" in Google and get absolutely nothing but weed shit.
My thinking is to have a much shorter day-night cycle that is closer to what the Earth rotated at billions of years ago.
I did eventually find out about the lettuce factory in Japan (Mirai) that produces 10,000 lettuce a day on less land that most places use to grow 1/4th that 2 times a year. This place has a special shorter day-night cycle too for increasing yields.
I have plenty of grow lights and timers and may set up something similar for my pepper plants or whatever else I can squeeze in (herbs, wild greens, my pineapples, etc).
http://www.gereports.com/post/91250246340/lettuce-see-the-future-japanese-farmer-buildsAlso, PodPonics have a similar system for lettuce growing, but their system is just effing crazy because it is modular and produces like 4 tons of lettuce a year per converted shipping container,
http://wabe.org/post/high-tech-farming-how-podponics-grows-lettuce-indoorshttp://www.youtube.com/watch?v=zWommg6JVfY 