They have a "chemical" accelerate witch causes the reaction to happen more quickly. 12 hour glow stick emitting all that light energy over just 5 minutes.
Keep the opinions coming
Also what if the player using them wasn't "littering" but keeping them on his persion (The objective in that point would be to make my self look like a nice target.)
P.S. what happens when a nv flares they brake purmanently or just shut off or just cause problems seeing?