OK so many many moons ago a bunch of us over at 3d Buzz would issue a challenge based on some simple rules, like having a ball roll around on another ball, with top marks going to the person who comes up with the simplest solution so I figured I would start one here. Of course the person issuing the challenge is not allowed to take part 
So the set up.
Start with six walls zero detail, aka no deco, use a single light element, no post process volumes or in camera effects,and post you result.
FAQ.
You can use any kind of material you wish.
You can make use of any feature available to the light element as long as only one element is used.
You can make windows and make use of sun blocks if using a directional element
Last
Cheating is allowed and is encouraged