And what kind of CSI office would be that dark. Each room has like one light on and the rest is bathed in blue light. They would constantly be screwing up evidence cause noone can fucking see shit.
Yes it's "fantasy", but for gods sake gimme some reality in my fantasy, you can only take the absurd so far before it starts looking absurd, and CSI looks absurd.
Now if you will excuse me I need to break out my Inframicrothermoneurooscilloscope and check for some evidence.