Fastening strap for attaching the Lumonite lamp to a bicycle helmet. The strap is a high-quality, non-elastic material with a strong velcro fastening. The o-ring needed to attach the lamp is delivered with the lamp. The helmet mount is equipped with a Velcro strap that sticks well along the entire length of the strap, thanks to which the mount can always be tightened tightly, regardless of the shape of the helmet, the distance of the ventilation holes, or the size of the helmet. Suitable for e.g. for the following lamps: Lumonite Air Lumonite Navigator Most Magicshine and others lamps that use the corresponding mounting method