[@Bright_Ops] So, uh, not to kill the feel in your post, but there's no glow about the Voidwall Grenade post explosion. It's basically a grey canister created with the power of the Traveler's Light that contains Void Light.

EDIT: Also, to give everyone a better idea of what the Traveler's Light is:

Arc Light is derived from the deep forces that bind together complex matter.
Solar Light is derived from the energy produced by quantum forces.
Void Light is derived from the dark energy of the vacuum 'beneath' matter.