Oumers Cycling Wheel Spoke Reflector Clips, Reflective Mount Clip Tube Warning Strip Made with Scotchlite Reflective Material 360 degree reflection for improved visibility, Make your bike more fashionable and shine, enhances safety by increasing visibility at night and during bad weather conditions. Fits all standard spoked (1.8 - 2.0mm diameter) Give a strong reflection under the light irradiation Easy to install and remove. This is reflective strips (not light bar, couldn't light itself), will be reflective in the light irradiation and give a security warning! Couldn't luminous if you ride in the dark without light!