![]() If the light gets down to 5 percent of life or less, it will need two hours to full charge. The light easily unclips from the stretchy rubber seat post mount and charges using a micro USB cable (included). That same button features a status LED light that displays battery life. Its four modes are easy to toggle through via a large button on the top of the light. The Flare R also has decent sidelights and claims 270 degrees of visibility. I couldn’t find a stretch of road to test that, exactly, but I was able to find out that if you look directly into this light while standing next to your bike, it will mess up your vision for a few seconds. Visible From 1.2 Miles AwayĪnyway, Bontrager Flare claims this light can be seen from 2 kilometers (1.2 miles) away during the day and 5 kilometers (3 miles) at night. Car brake lights are around 350-500 lumens. A standard 25-watt lightbulb (the ones that are difficult to find nowadays) gives off about 220 lumens. What’s a lumen? I read somewhere that lumens are to light the way gallons are to milk it’s a measurement of how much light is given off. The night time output is 5 lumens in steady mode and 65 lumens in burst mode. The daytime steady mode is more modest than 25 lumens. The Bontrager Flare R puts out 65 lumens in daytime random burst mode-an impressive level of brightness that completely outdid every other rear bike light on the last group ride I was on. Now I’m pleased to see that daytime running lights for bikes are being taken more seriously. ![]() ![]() It wasn’t very bright and functioned more as hopeful optimism than a true (Bontrager Flare) safety device. Seven years ago, I rode my bike across the country with nothing but a $13 red bike light strapped to my Seatpost.
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