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Night lights that detect light levels are probably flickering so fast that it just appears to be on
(self.showerthoughts)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
You need to research how optical sensors actually work.
From this source:
I'm high and I just wanted to post something low effort that I thought was funny. I know it's more complex than the way I described it.
Edit: also, diodes are directional. Saying that a photodiode is "a diode wired in reverse" should be the first sign that I know more than what I'm actually saying. All diodes are capable of reacting to light, a photodiode exploits and amplifies the principle.