I should have also mentioned that mine is old. It’s a Niterider 1200 pro. Now the newer models have 3,600 lumens and weigh a whopped 1.7 pounds total. 90 minutes of power at 3,600 lumens or 36 hours of power at 100 lumens with settings in between.
Check out this bad boy: http://www.shopbarska.com/Flashlights-1200_Lumen_High_Power_Tactical_Flashlight.html?gclid=CJG4xPzwt7ECFclgTAodV1IA7g
After conducting experiments with my 200 lumen light, I believe a couple of the 1200 lumen ones could replace my car’s headlights and offer more brightness at less than 1/3 the wattage.