Most EDC lights give you the same basic interface. Press here, get this mode. That's it. The new EDC 37 lets you program exactly what each button does: 8,000 lumens output with 8,000 mAh battery 7-hour runtime at 1,500 lumens Customize controls to match how you actually use it Fixes the runtime complaints from the EDC 29 It's the first time an EDC light feels like it adapts to you instead of the other way around. | Nitecore Lights