The lezyne femto drive led light set is a great all round set that is designed as a safely light to ensure other road users or cyclists know your whereabouts when riding the light set offers visibility of the path in front of you and aids streetlamps in lighting your path with its 15 lumen output the lenses of the light set are made from of high grade optical material and serves as an activation button that has four flash and one solid mode for you to choose your preference both of the lights