Bright LED output - 110 Lumens Integral hook for hands-free use in multiple placements Head rotates 120 degrees Low heat output compared to Xenon lights Efficient LED bulb improves run-time 11 - 25 hours of run-time depending on battery amp hour *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18 Visual LED bar graph indicates the presence of voltage. The higher the voltage sensed, or the closer to the voltage source, the more LEDs light up