I have a good light in my sewing room, but moved my table a couple of feet towards the far end of the room, a while back. Took me forever to figure out that the 'good light' was now casting a 'good shadow' on my cutting station. Easy fix--just moved to table back to its original position.
I don't know if you folks in the US are acquainted with Lee Valley Tools. Up here it is a well known woodworking store. My Dh got me a multi-positionalbe fluorescent lamp that clamps to my sewing table. Best of all, it has a magnifying glass in the center. I cannot count the number of times I have used it to see and remove pesky little stitches that hide themselves in the weave of the cloth.