Key to the lighting in my builds is cutting down led strip lights then stucking them under the last PCI slot.. then for top get 3 black fan grills.. then stick and ziptie another led strip light to the fan grills.. provides proper spacing away from fans and strip goes down the middle for best lighting.. my case sits below my head so I never see the strip lights.. I love the lighting in this build.

Notice the no-glue heat shrink tubing around the GPU power cable. Better than zipties and not as bulky as velcro straps or cable combs.