Andrew Huberman· PhD
the uh anywhere that's more than say 20 30 40 miles away from a big major city is fine even in San Diego there's two dark sky communities one is called Julian California and the other one's the anab bgo desert and it's called bgo Springs these are areas where they uh forbid upward Shining Light so the only light can be downward facing it also has to have very narrow spectral bands on it so like