What I think you are saying is you can't figure out where you've quilted while your quilting. I have this same issue with white thread on white fabric. I kept increasing the light, but it didn't help. I finally decreased the light (I was quilting in a bright sunlit room and waited until the sun went down a bit) then situated the lamp so that light was shining across the quilt, not directly down on it. With the light going across the fabric, the texture of the quilting showed up, so I could figure out where I'd been & where I was going.