Many indoor growers like to grow in the dark initially.....I prefer a balanced leaf/root approach. I'm sure the rooting still works out the same in he long run. Find a way that fits your lifestyle, $$ to play with and your time commitment. I like free and carefree so jelly jars and water on the window sill works well for me. Others may think it is old fashion. But it works the same as a clay cup in the sun 2000 years ago. Lights, timers and gnats......been there done it with no better results that my window and no gnats.