This is the Malkoff Devices High Output P60 style dropin with solid brass heatsink construction. This design utilizes a custom orange peel reflector designed by Don McLeish. The reflector offers a very nice balance between throw and spill. It has massive spill (very floody) with a smooth transition from hotspot to spill. It is an outstanding room lighter and short to medium spotter. It was designed specifically for use in Malkoff MD Series (3 or 4) with MD2 Head, Elzetta ZFL Series (3 cell), and SureFire 9P and C3 flashlights. It will work in 2 cell lights with rechargeable batteries. It may or may not fit other models. The input voltage is 6.5 - 12 volts. Below 6.5 volts it will flash repeatedly or turn off (depending on batteries used). The output is approximately 450 measured out the front lumens at turn on and 400 continuous lumens after warm up. The current draw is only 800ma at 9v and 600ma at 12v. The full output runtime is approximately 1 1/2 hours on 3 CR123 primary batteries. It will then begin a long taper. It will easily illuminate objects at 250+ feet and will blind opponents within a 100 foot radius. The LED is a Cree XM-L.