Streamlight SL-20L Flashlight, C4 LED 450 Lumens, AC/DC Charger Black 20703 Feature packed" the SL-20L full sized professional grade" high-intensity" rechargeable flashlights offer 3 microprocessor controlled variable intensity modes" strobe mode and the latest in power LED technology. The combination of rechargeable batteries and the C4 LED results in one of the lowest operating costs of any full size flashlight made