Dennis Plunkett wrote:

> Just from the users point of view, if you do an economy run during the
> day and another at night which one is best and why (Its not because
> your car can not see where its going at night either)?

  What about the extra 200W of lighting power divided by the efficiency
of the generator (alternator)?  If we're talking about an "economy run",
this could be significant.

  Cheers,
        Paul B.