The Wildcat 18650 Flashlight utilizes the Wildcat 18650 Head and the MDX2 Body and MDX Tailcap. This Flashlight was Designed for use with a Single 18650 Li-ion Battery. The Cool Variant produces produces 1050(measured) Out The Front Lumens at turn on and 950 (measured) continuous Out The Front Lumens. The Neutral Variant Hi-CRI (90 CRI) produces 900 (measured) Out The Front Lumens at turn on and 800 (measured) continuous Out The Front Lumens. The Flashlight Head utilizes a 10 degree Optic with a 5 degree diffuser. This Head produces a beam with a nice even floody pattern and limited throw. The Lux is 5500 at one meter (cool) and 4000 (neutral). This is a real room/warehouse lighter. The LED is a Cree XP-L. It will easily light objects at 150+ feet. It has a High/Low Switch installed as part of the driver. The High/Low output is controlled by head rotation. The low output is approximately 65-75 lumens. The High/Low is controlled by head rotation. The input voltage is 3.6 - 6 Volts. The current draw is 3150ma. The runtime on the included 18650 battery is approximately 1 hour at full output (down to 500 lumens). Then another 45 minutes of bright output (down to 100 lumens) followed by several hours of declining output. This Flashlight was designed for rugged service from the ground up. It is fully potted for rough service. Physical Dimensions: Length: 6 inches Body Diameter: 1.08 inches Head Diameter: 1.8 inches Things to Know Before Purchase: This Flashlight is Designed for Bright Flood with Limited Throw in a Small Format. It is Basically a Punchy Flood. This Flashlight is NOT Designed for Maximum Throw. It has a Smooth Beam that gets Progressively Brighter from the Edge to the Center. The maximum input voltage is 6 volts. Exceeding 6v will ruin the head The head is protected against reverse polarity. This light is capable of causing eye damage at close range. Please use the light responsibly!!! Battery Warnings: - Do Not over discharge/overcharge - Please recharge drained batteries ASAP - Do Not short circuit - Do Not dispose of in fire - Do Not expose to extreme heat or water - Please be familiar with the handling of Lithium-ion batteries prior to purchase Lithium Primary and Li-ion Rechargeable Batteries are Inherently Volatile and Dangerous to Store and Use. All Lithium Batteries Introduce the Risk of Fire, Burns, and Explosions. You Assume the Responsibility of Educating Yourself About Their Use and Storage Before Purchase! If You are Uncomfortable With This, Do Not Purchase this Light! Made in the USA. Some parts not domestically sourced. This item is covered by our Lifetime Warranty.