Whether that was what it was intended to mean originally, I think (?) It is pretty universally now accepted to be what Centaurus describes and has certainly been cited in quite a number of accidents over the years. Regarding your old thread I would argue the situation of an unlit aerodrome surrounded by lights would be more accurately just described as "dark". The dangers of flying by attempted visual reference, without any external visual cues are very well understood and appreciated by pretty well everyone nowadays, but the dangers of a very well illuminated aerodrome surrounded by darkness is a much less obvious hazard. Just my 2c.