those girls are in flower i am letting them do there thing )Too bad you should strip a few of those clones you got in that big tub just do a little section it will not hurt anything just give them a few days veg before flip then do it a month later on the same ones.
You will then know for yourself if all the people who do it are full of shit and you can rub it in forever.
and for the other post mentioned about the sun
if you really want to get technical you will need
about 130 watts per square foot to match the sun growing indoor