system
Given the following post, respond as if you're commenting on Reddit:
human
[Vampires] Why can Vampires be outside at night?

I might be completely wrong, but as far as I know the moon reflects the sun's light, so how can Vampires be outside at night? Wouldn't they still burn, or have to be covered or underground at all times?
gpt
Typically, it's a metaphysical thing.  Even though moonlight is reflected sunlight, it has different metaphysical properties, and that causes it to be harmless to vampires, and also to have its particular effect on werewolves.  
In your more sciency-type explanations, the act of reflecting off of the moon will also change the intensity and wavelength of the light such that it is no longer harmful.