This trait causes pawns to be extreme light sensitive, giving them -15 mood in bright light, -5 mood in light and +5 mood in the dark.
The mood loss caused by bright light is really killing my pawn's mood and there doesn't seem to be any way to fix the issue other than making her stay indoors (constant -5 mood, because im not going to make my base dark just for her) or let her work outside at night.

I think replacing the eyes with bionics (or removing the eyes) should negate the trait totally and wearing items that cover the eye slot should reduce the mood debuffs/buffs.

Vanilla apparel extended mod adds sunglasses and I think wearing them could also work as possible solution for the player to negate this trait.