The versatile lezyne micro drive rear light is the perfect compliment to its front counterpart and is designed for all types of riding including commuting road and mountain biking in standard mode the light outputs an ultra bright 30 lumen red led light and lezyne rear bike light also features a high visibility 70 lumen daytime flash mode which will definitely get you seen whatever yoursquore up to the light easily attaches to a wide range of round seatpost diameters v