Wall-mount lighting for gaming desk?

Hey All, below is a picture of my desk. I don't have much room, so it's the best I can do right now. I'm trying to find a nice wall-mount light (maybe one of those 3 or 4 50watt bulb systems that mounts on the wall, but one that doesn't need an electric box to wire it in to. Something that just has a simply on/off or dimmer switch attached to it. Any advice would be greatly appreciated.

Thanks!

Are you looking for room lighting or ambient lighting?

This would probably more of an ambient lighting setup specifically for the computer desk. I'll have as separate light elsewhere for the room.

$80 Single Spotlight Plug-in Swing Arm Wall Lamp on Amazon. Just search around for plug in wall light or lamp until you find a model type you prefer. This is a swing arm model with a dimmer.

Great! Thanks for the suggestion and info. I couldn't figure out exactly what to search for so I was having a hard time. Thanks again guys!