My first grow is 17 days in and I could not be happier. My babes are large and getting larger. I had to flower at 8-10" due to height concerns and was not an issue. My Lamp height is now 12" during my 12/12. I have my lights on at night for $$ reasons. Do not over water espec in Veg state its...
I also just began my first grow from clones . Used diff bulbs : one for Veg and one for flower. I had my clones in Veg for 12 days until i saw each one had pistols forming. then changed the bulb and the timer to 12/12. During Veg I had the lamp ( air cooled 400 W ) 24" and they seemed to love it...