A stackable LED flare and system for use at night, in low light conditions or during the day where a lighted flare provides greater visibility. The flare comprises a multi-sided housing with a panel on each side and having a top and a base. It has a plurality of LEDs aligned in windows positioned in at least one of the panels. The flare includes a re-chargeable battery encased in the housing for powering the flare and a circuit for delivering power and operational control from the battery to the LEDs upon activation by a switch. A set of contacts positioned on the outside of the housing deliver a charge to the battery. The contacts are configured to allow multiple flares to be stacked and charged simultaneously. The system also includes a charging station that accommodates a stack of two or more flares during the charging operation.