Timing light definition
A stroboscopic unit that is connected to the secondary circuit to produce flashes of light in unison with the firing of a specific spark plug . By directing these flashes of light on the whirling timing marks , the marks appear to stand still. By adjusting the distributor , the timing marks may be properly aligned, thus setting the timing . Xenon timing lights have the advantage over neon lights because they are more visible in daylight.