Not quite Don, I have three other tachs you can point at the light and get a perfect reading, point them at a prop with any background and they can't read it. I gave up on the cheap tachs and bought the TNC, it works under any light conditions you would fly in. These new little tachs wired into the ignition are slick. Like all tachs, not often really needed but I have a couple of engines that are way easier to tune with a tach.