Check out my S5 with a Spigen case
Here's my S5 with a clear Spigen Ultra Fit Capsule case / cover. When you cover the flash LED with your hand or just lay it on your desk, the cover disperses the light to the bezel area and gives it a nice glow.
Keep in mind: the photo does exaggerate the effect a bit. Actual color and intensity of the glow depends on what the phone is laying against. If you're holding it in your hand, it will be a bit pale / yellowish. Still very cool though.