In article , Smitty Two wrote:
In article ,
(Doug Miller) wrote:

Lighting is a *huge* cost for retail businesses -- look around next time
you're in Wal-Mart, Home Depot, or any supermarket.

There's a Costco in my g.f.'s city that uses zero lighting during the
day. The roof is riddled with skylights. Since Costco closes fairly
early, I'd guess their entire lighting bill is very small.

Do they close on cloudy days? Or at 4:30pm in the winter?

Their lighting bill is a lot larger than you think.