Description:

Length: 3.2 in (81 mm)
Width: 1.4 in (36 mm)
Depth: 3.2 in (81 mm)
Weight: 7.2 oz (204 g)
Diameter: 1.1 in (28 mm)

This is one of the brightest helmet lights available. This is a full 10 lumens brighter than the competition. The NSP-4640B Helmet Mounted flashlight is a power house! It is the most versatile choice when it comes to firefighter helmet flashlights. A tight beam allows the Forge to cut through smoke better than the competition. It's power beam will shine for 715 ft in clear direct line of sight. The user can also choose a lower 180-lumen setting for increased runtime. The 4640 also features a 30-lumen for 30 hours Survival Mode. The 4640 will fit on any Fire Helmet (or side-brim hard hat) regardless of whether it has an up-turned or down-turned brim thanks to the multi-angle mount that allows the user to fine-tune the exact light position and angle for optimal aim. This feature makes it possible to not only avoid goggles, face shields, and other helmet-worn gear but also place the light exactly where it's needed. The 4640 is IP-X7 rated waterproof and meets the requirement for NFPA-1971-8.6 (2013). Power comes from 2 included CR123 batteries.

User-selectable 360-lumen High, 180-lumen Low and 25-lumen Survival modes
A single push-button switch operates easily with heavy gloves
Switch features built-in rear-facing green safety LED
360-degree multi-angle mount allows the user to select exact angle and position for optimum light alignment and clearance of face shields, goggles or other equipment
Helmet clamp with rubber foot provides secure, mar-free attachment
Works with virtually all fire helmets and hard hats
Impact & chemical resistant
IP-X7 Waterproof
Meets the requirements for NFPA-1971-8.6 (2013)
Serialized for personal identification
2 CR123 batteries (included)
Limited Lifetime Warranty