At my company, we're having a debate about when anticollision lights should be operating. One of my pilots is interpreting the regulation as saying that at all times the anticollision lights should be operating. I am interpreting it as saying at night only. I can see his point, considering paragraph (b) of 91.209 seems to state that it is at all times. But paragraph (a) says from sunset to sunrise. I called AOPA and received an answer that it was "night" only. I was wondering what your thoughts were. Thanks!
Mark
Mark