Rosacea - Symptoms. Rosacea causes a range of symptoms, although not everyone will experience them all. Most people with rosacea have periods when their symptoms are particularly troublesome, followed by periods when their symptoms are less so.
Most motion detectors have a built-in override: 1  Normally the switch is kept on all the time. 2  If you turn the switch off and on within a second or so, the light will stay on, and this overrides motion detection. 3  To go back to normal operation, turn the switch off and wait ~10 seconds, then turn back on.
Also referred to as LIDAR (light detection and ranging), laser speed guns use light in extremely fast pulses to detect an object's speed. It has a range of 1,000 feet to 4,000 feet, and it's very accurate. One of the advantages of laser speed guns is that they're nearly impossible to detect beforehand.