Since stroboscopic lights drive me crazy, I decided on this model for night flying. In addition to the strobe ability, they have a continuous burn function, which I especially like in the dark. The 4 lights came prepacked with 8 batteries and tape already attached. 4 extra sticks and 8 extra batteries. The light is bright and burns out in less than 1 hour on one set of batteries. Batteries are not expensive, I buy 40 pieces.