Advice + help needed

hi guys.
i really need some help for these ones.
it's been since 8 weeks that i transferred my clones from 18H light to 12H. the results are below.


the white pistils appeared after 4 weeks and after again 4 weeks the pistils were all over the plants. But they seems to grow very slowly now.
i would like to know how to increase their growth process if possible or any other help, info and advices are really appreciated.
THANKS
FROST

bigger pots i think? they are 8 wk old right?

What are they planted in?Pot size?

You need more light, closer to the plants, and larger containers

lower the light if you can and use a halide or SHPS...... that will help woth the stragglenss

hi guys , thanks for your help.
am already using a 400hps and they are close enough. closer starts to burn them. they are planted in vermerculite and the plants pots are around 5cm. yes i agree these are small , but i didn't think that the plants would be such height.
was doing everything to get a sea of green method. but here are the results. but the plants look great, white pistils, good strong roots, green leaves, no sign of any deficiency or what so ever.
must i wait longer as the " bud " are about 1cm only.

honestly i dont see much yeild coming from plants that size unless you have 50 and even that what 1-2 grams a plant?if that.