lighting basically means that you focus on the main focal point (usually the player) using light, maybe a soft brush or bright stock of some sort. I usually burn the edges of the sig. I can tell you are somewhat new to this, but the background contrasts waaaay to much with the render. Having a mostly black BG with a white render is somewhat gutsy, but doesn't pay off here. Also move the text closer to JStew.
dude thats actually a lot better, but yeah, its too monotone in the BG and kinda sharp. Try starting the BG again, but keep it dark, looks good so far man