The light isn't for cutting paper in the dark. With the light, you can see behind your picture or some cardstock so that you can see exactly where you're going to cut. I use the light on almost every cutting job. It's perfect for when I'm trimming pictures. On cards, I often use a printed verse inside so it makes it very easy to cut it so that the verse is centered correctly.
Wash: "A man walks down the street in that hat, people know he's not afraid of anything."
Jayne: "Da*n straight."
-- my recipes