i had T-5 CFL's with a 150w HPS to get good growth.....150 HPS bulbs are just standard bulbs and not really made with horticulture in mind...so i would look at adding some cfl's to increase your lighting spectrum.

get some good soil like fox farm....the stuff you have looks like it will hold water and not drain well...aeration in the soil is needed to get good root structure!

and everything else Rusty Trich said!:thumbsup: