In HK village houses the spiders are outside ... we look for snakes swimming up from septic tanks (yes they are still used even in some new village houses) or coming through bath drain that goes to outside drain (yes still a thing).
I do have to, this is why I bought one of those IKEA smart bulbs and made it dark and blue. If I get up at night, I use my watch for light.
Why blue and not red/orange?
I did have red but it didn't feel as good as blue.
I've also read somewhere that even the US Navy is changing to blue in their ships for some readability reasons.
No but I think many people in fact turn the light on when using the toilet.