A tactical flashlight is an essential tool for professionals and prepared civilians alike. Understanding the specifications and features helps you select the right light for your needs.
Understanding Light Output
Flashlight brightness is measured in two key metrics:
Lumens
Total light output from the source. Higher lumens mean more overall brightness. For tactical use:
- 200-500 lumens - Adequate for general use and close-range tasks
- 500-1000 lumens - Ideal for most tactical applications
- 1000+ lumens - Maximum illumination for search and rescue or long-range identification
Candela
Peak beam intensity at the center. High candela means better throw distance. A focused beam with high candela reaches farther than a wide beam with the same lumens. Tactical lights prioritize candela for positive target identification at distance.
Battery Technologies
Your battery choice affects runtime, output, and convenience:
18650 Rechargeable
The tactical standard. High capacity (2600-3500mAh), rechargeable hundreds of times, and consistent voltage. Most modern tactical lights use this format. Initial investment in batteries and charger pays off quickly.
CR123A Lithium
Non-rechargeable but available anywhere. Long shelf life (10+ years) makes them excellent for emergency kits. Two CR123As equal one 18650's voltage but cost adds up with regular use.
AA/AAA Alkaline
Universal availability but lower performance. Acceptable for backup lights but not primary tactical use. Cold weather significantly reduces output.
Key Features
Durability Standards
Look for IPX8 water resistance (submersion rated) and impact resistance testing. Aerospace aluminum bodies with hard anodizing survive the worst conditions. Glass lens with anti-reflective coating protects the LED.
Switch Types
Tail switch - Intuitive activation, works with any grip, allows momentary-on. Side switch - Easier mode changes, works in holsters. Best lights offer both.
Modes and UI
Tactical lights need instant access to high output. Avoid lights requiring multiple clicks to reach maximum brightness. Strobe function is useful for disorientation. Low modes preserve battery and night vision.
Top Picks by Category
For EDC, compact 18650 lights around 1000 lumens offer the best balance. Weapon-mounted lights need dedicated designs with recoil resistance. Headlamps free both hands for tasks.
