Glowing pellets for night hunting.

If you just use a bright spot light on target from behind & above you, shown on target, it works.

You can track with your eye from PCP, SSP, sled springer or soft tuned springer.

CPHP’s have more antimony & shine more, penetrating deeper also.

GTO alloys are absolutely excellent for it. 
I can track 16.54 grain GTO .25’s out to 50 yards from Sumatra & Japanese Bushnell