Quote: You use them and say they work because you haven't had any problems...not really proof IMO.
The vids I saw with preds pacing all around right past the Night Eyes flashing steadily on the coop/run,
and in one case getting into, a run/coop proves to me that they don't work....only secure fencing and doors keep predators out of run/coop.
The flashing lights might alarm wildlife when first installed, but they are pretty savvy in realizing after a short time what, and what isn't, a real threat.