Abstract: A lighted bicycle safety device with an actuatable safety light contained within a lighting apparatus. A light, power sours, and light switch are all compactly contained within the apparatus, which is pivotally connected to a bicycle to move between an operational orientation where the lighting apparatus is oriented substantially horizontally and laterally and the illuminating lens extends beyond the outermost side of the bicycle, and a storage orientation where the lighting apparatus is oriented flush with the plane of the bicycle frame. A straightening spring absorbs impacts of passing motor vehicles. An on-off switch projects from and slides along a channel formed in the apparatus. The switch moves a sleeve and a light bulb retainer to shift the light bulb between on and off positions.