What Our Gearhead® Experts Are Saying:"The Rack Pro StVZO E40 sits cleanly on the rear rack and the difference in visibility compared to a standard seatpost light is immediately obvious. The Vivid Optics spread light wide enough that cars coming from side streets actually pick me up well before the intersection, and the IPX7 rating means I never think twice about riding in the rain."The Lezyne Rack Pro StVZO E40 Rear Light is built for e-bike riders who take their visibility as seriously as their ride. Mounting directly to the rear rack for an optimized sighting angle, it puts twelve high-output LEDs to work through a StVZO-optimized lens that meets the regulatory standards demanded by some of the most rigorous cycling markets in the world. Vivid Optics technology floods the surrounding area with light for genuine 360-degree visibility, catching the attention of drivers approaching from angles that a standard seatpost light simply cannot reach. Lezyne engineered the E40 specifically for e-bike power systems, with a 10. 5 to 13. 5V input range and 1. 7W draw that integrates cleanly with e-bike electrical systems without compatibility concerns. At 45. 8g it adds virtually nothing to the rear of the bike, and the 50 and 80mm rack mount spacing options cover the majority of rack configurations without modification. Stainless allen key hardware and a 135cm power cable are included, and an IPX7 water-resistance rating ensures the light performs consistently through rain and wet road spray on every commute and long-distance ride.