This ensures optimal visibility in traffic. The 30 lux headlight illuminates up to 50 meters ahead of you and you are visible to oncoming traffic from 3000 meters away. The Nightjar headlight has two modes, 100% (30 lux) and 50% (15 lux), allowing you to adjust the brightness to the situation. The elastic rubber strap easily attaches the headlight to the handlebar tube. The Nightjar taillight provides good visibility for both oncoming and side-on traffic, for added safety. The back of the Nightjar taillight has an angled design so that it is in the correct vertical position against the slanted seat tube. Both the headlight and taillight are fully charged within 2.5 hours using the included USB-C charging cable. The lithium polymer battery ensures that the lighting set is lightweight while delivering maximum performance. This rechargeable USB lighting set is StVZO approved. In display box.