Need more Horsepower

noticing my autos don't like as much light in fact way less than I thought verses my photo. I am in late veg early bloom right on the transition shift and my 4 sf1000 are running 100% @12" to top of canopy. I have ran out of horsepower lol . She is screaming for more.  Dreaming of a bar led with at least 500w- 600 w with a dimmer. in a 48"x48"x78" 

I know in the beginning I started off light on nutes but she quickly showed me she could clean the fridge. Damn she is a pig.