They sure do. It shows you that our eyes do not make good LPM's. If it was an efficient diode, then it would operate at a higher power and hence look brighter. But it seems to be hovering around 5-6mW which is good. Also I need to make a reading with a tripod so the LPM can register for the right amount of time with better steadiness. There's a limit to how still I can keep my hand.