The HL-1500 uses Hyper Halogen Technology to send thousands of pulses of energy to the bulb every second. In the 1,000-candlepower energy-conserving low setting, the battery life is extended to six hours. With a flick of the switch, the Hyper-Halogen is in the brilliant 3,000-candlepower high setting for increased visibility. Side light markers provide additional visibility from the right and left. With the high and low settings the hyper halogen can maximize both your light output and battery life.