In almost all cases, it is possible to make some very simple changes that
improve the efficiency and the quality of illumination of your present lighting
system. Many of these changes cost no money and all start saving money instantly.
In making these changes, however, it is important to consider the benefits of
some of the more extensive modifications. Depending on your point of view, a
$1,000 modification that pays for itself in energy cost savings in just one
year may be less expensive than a $100 modification that won't pay for itself for
five years.
And Furthermore . . .
