<<What do you do for light when you are awake when it is night time?
I think it is unnatural to use electric lights to prolong the day. If
you
tried
to eliminate
electric or artificial lights when the sun is down and then observe
your
sleep
pattern,
you might find that you haven't been sleeping "very naturally" at
all.>>

Hi Michael,

That would be extremely difficult to do as I work well into the
evening each
day.  When I say 'natural', what I'm saying is that I am seldom tired.
I
never use an alarm clock; I sem to awaken when I've had enough sleep.

Siobhan