Reply To: Automatic Lights and Videos on Shabbos

ShlomoZalman, if you are unaware it is Misasek. If you know that it is somewhere but you don’t know where, then it is Eino Mischavein as long as you’re not trying to turn it on. If you don’t care at all for it, like someone else’s light, then it is Lo Nicha Lei, which is Muttar according to many Poskim even by a Psik Reisha. It’s actually a Machlokes Rishonim.