i have a 30g tank ,with a regular tank lid and regular light. im sick of the [few] plants i have growing super slow. and i hate the pinkish tinted lighting. ive seen some excellent tank lighting on here, but i dont want to add a light figure that needs its own new compartment. i just want to stick it back where the other light went. so, what do i need to look for? and is this possible, or do i need a new lid or somethig?