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Yes and no. I have no actual experience of installing bathroom lights. I have no sense of what people actually install. I've just finished my course which included a big design project including a swimming pool, and with my limited knowledge I feel like if I was going to the effort of changing a light, I'd probably want something that seems protected from the environmental conditions. In this case IP65 seems about right.
Thinking about it, the downlights in our bathroom kill bulbs relatively quickly - I suspect they aren't IP rated to any degree. But I know that a lot of the electrics in here aren't up to the regs.
IP20 aint going to cut it then is it?