The Planet Bike Blaze Dynamo SL headlight is highly visible, even in daylight. It produces 150 lumens with amber side lights, which provide 275 degrees of visibility. The Cree LED produces the 150 lumen light along with Superflash and Courtesy flashing modes. The Blaze Dynamo SL works with 6V - 2.4 or 3 Watt generator hubs, which are not included. The headlight's mounting bracket easily mounts and adjusts without tools. There is a Power Reserve function that keeps the light working when you stop. A quick-disconnect cable makes it easy to remove the headlight. The Blaze Dynamo SL is water resistant, rated to IPX6 and weighs just 89 grams.