3 AA-Cell (pen-light) version of the Twin-Task. Equiped with a Xenon bulb and 3 LEDs. 2.6 hours run time on the Xenon bulb (46 lumens) or 80 hours on the 3 LEDs.
2 D-cell version of the Twin-Task. Equiped with 1 Xenon bulb and 10 LEDs. 9.5 hours run time one Xenon bulb (45 lumens), or up-to 80 hours on 5 LEDs or 50 hours on all 10 LEDs.