A safety light is provided which is removably securable to a marine safety vest. Marine safety vests commonly include a back panel and two front panels, each of which have a first side and a second side and at least one slot formed therein. The panels are connected by straps which are threaded through the slots. The safety light includes a lamp which is pivotally mounted to an outer surface of a first plate. A threaded shaft extends from the inner surface of the plate to extend through a slot of a front panel of a vest. A battery pack or other energy source is provided to power the lamp. A securing member is provided to be placed against the inner surface of the front panel and includes an internally threaded boss which receives the shaft of the first plate to secure the safety light to the vest.