The 4 current outcomes are essentially:
10% chance the creature ignores the light, and is unaffected.
50% chance they get confused and wander off for a turn, IE, delayed, but sort themselves out and rejoin the battle.
35% chance they wander off and trip on something, and hurt themselves, damaging their ability to fight.
5% chance they wander off, get stuck or permanently lost, or trip and die.