Lighting

[Jawaits]

I have 2 40w 48inch t8 bulbs over a 20 gal tank One blue and one white (marine glo and power glo) I am getting growth in my star pulps I have three types ( blue green and red) I was wondering what all I could grow in my tank I have 4wats per gal now but is that enough I want to grow zoos so I can drag them and save up for a metal haliade fixture for my dream tank
I'm also breeding clown fish to help in earning some money

Tl;dr - is 2 48inch t8's over a 20 gallon enough to grow zoos or LPS