drb wrote:
I need to install some new kitchen light lenses. I believe that's
what they are called. These appear to be made of plastic tho I'm not
100% sure. If I need to cut them, what is the best tool for that, a
sheet rock knife or something else? And when I cut it, should the
finish side be facing up or down?

If what you have are flat plastic lenses like
those in 2X4 lay in florescent fixtures seen
in offices everywhere, only smaller in size,
you can buy 2X4 replacement lenses from one
of the home improvement stores and cut them
down with a plastic scoring tool like the one
I use.

http://www.rplastics.com/plastic-cutter-ks1.html

I do believe that the home improvement stores
carry the tools as a regular stock item.

TDD