I can't provide any measurements, but yes, you have a match.
It isn't a movie projector...it is ok if light dribbles off the cloth, ya know?
To some, it isn't acceptable
Believe it or not, there are light snobs!
Diamond recommends the bottom of the light to be 78 inches from the floor...
If this does not shed light enough for the 8' table you'll want to rise the light a few more inches..
Rob.M