We plant lovers can't resist growing them indoors, often providing artificial light. Lights on during the day; lights off at night. That can take a toll on our electric bill, though. The more lights we burn, the more it costs us.
Professor of Horticultural Sciences and Plant Molecular and Cellular Biology, University of Florida recognized the problem as it relates to commercial indoor plant production. As he experimented with possible solutions, he learned that short intervals of light and dark can save electricity without effecting the crops. Here is a link to his article on the subject. I believe you'll find it to be very interesting.