Hello.

I'm trying to work with Area Lights, but I can't seem to orient them correctly.
I've been trying a <-50 , 0 , 50 > , <50 , 0 , 50 > and that doesn't seem to
illuminate my scene, so I tried a <-50 , 0 , 0 > , < 0 , 50 , 0 > in an attempt
to make the angles at 90 degrees to each other, but that doesn't seem to have
worked either.

Any tips on how to generate a proper Area Light?  The documentation is a little
slim.  What I have developed seems pretty dull, too.

Thanks very much.

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