We find it a bit annoying. It's pretty bright and we think it's weird that the night mode has the bright LED.

Level 1 doesn't have an LED and so we tend to use it more often at night. It's pretty quiet too.

The LED in night mode is not very bright, it does not bother me personally.
Level 1 is louder.

The LED is not very bright/not disturbing.Stage 1 has no LED, but is somewhat louder.

The night-time LED is so dim that it's barely noticeable! The fan is very quiet, so even in mode 1, it doesn't bother you at all.