Maglite ML300LX LED D-Cell flashlight is the light for all your needs. Since the beginning, Mag Instrument has prided itself on its beam-forming optics -- the quality of its precision-designed and precision-crafted reflectors, and the versatility of its spot-to-flood beam focusing mechanism. High-quality optics help a flashlight to direct light in a useful way without excessive power consumption something that the brute force approach of maximizing lumen output cannot do. High-quality optics can also play a role in slowing battery consumption and prolonging Run Time. As LED technology continues to advance, the number of watts of power consumed per lumen of light generated goes down; but it is still true to say that the more lumens you want, the faster you will consume battery power.