While battery-powered lights are commonly rated in lumens, dynamo lights are more often rated in lux. When choosing a dynamo lighting system, you’ll need to consider both brightness and beam pattern.īrightness is commonly described in two different units of measure: lumens and lux. Similarly bright battery-powered lights have run-times of only 1-3 hours before they require recharging.ĭynamo systems offer plenty of light and can be tailored to suit different riding styles. A single dynamo can power both front and rear lights. In most countries, cyclists are required to have a white light up front and a red light in rear. This feature ensures that you remain visible while stopped at intersections. Lights are also required to have a standlight feature, a built-in capacitor that continues to power the lights for four minutes once you stop moving. A concentrated beam illuminates hazards on darkened streets without blinding oncoming motorists and cyclists. These stringent and specific regulations are in place to ensure that cyclists are well lit from all directions and that the lights don’t interfere with other traffic.Ī headlight should have a horizon, meaning that the light’s beam is limited by a hood at the top and aimed so that the center of the beam hits the ground 33 feet (10 meters) from the front of the bicycle. Most dynamo lighting equipment is designed to comply with German road-use regulations (StVZO/TA). A good light is bright enough to be visible, illuminates the road without blinding others, and stays bright while you’re stopped at a traffic light.
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