4 Best Glock 21 Light Options [Updated 2025]

Here are 4 best Glock 21 weapon light options. We have purchased and used these pistol lights based on practical use, lumen output, activation switches, size and price.

The Glock 21 is a full size 45 ACP gun for vehicle carry and home defense, and these light options will give users the best low light illumination capabilities. 

Best Glock 21 Weapon Lights

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Streamlight TLR 1 HL X - Best Overall

The new Streamlight TLR 1 HL X gives your Glock 21 so much illumination power with 1500 lumens, aka 33% brighter than the original TLR 1. It's by far the most popular duty grade 45 ACP pistol weapon light that offers great illumination capabilities at a good price point.

Easy To Activate Switches - No need to hard press the switch to activate the light even in cold freezing weather with or without gloves

Replaceable Lens Bezel - Quick and easy replacement

Strobe Mode Added - Blind threats with fast rate strobe light to gain tactical advantages

Features:

• 1500 Lumens
• 20000 Candela
• 2 CR123A Batteries
• 4.18 oz
• 3.39 in
• IPX7

Surefire XH30 - 2nd Best Duty Light

The Surefire XH30 is newer model of the X300U. It's the go-to duty grade handgun light for the military and law enforcement for close range low light applications.

Slide Always In Battery - Prevent the slide from getting out of battery during point blank muzzle-to-surface contact engagement to save your life.

Strobe Mode Added - New strobe mode added to blind threats like the TLR 1 HL

Balanced Throw & Spill - You get the hot spot and wide illumination. Make sure to get the XH30 for this feature, not the XH35

Mounts Directly To The Rail- Glock rail key included to fit on Glock 22 full size frame. Use it on other pistols with universal or Glock rail slot.

Built To Last - Mil-spec grade aluminum housing protects electronic components inside from sharp 45 ACP recoil impulse, drop, and day to day field handling.

Features:

• 1000 Lumens
• 11300 Candela
• 2 CR123A Batteries
• 4.8 oz
• 3.7 in
• IPX7

See detailed XH30 reviews here

Olight PL Pro - Best For Training

Why Train With Olight PL PRO? - The PL Pro's USB charging capability makes this light very cost effective for high volume low light training at home or at low light training classes. 

High Lumen - Very powerful illumination in CQB environment to ID targets

QD Lever Mount - Detach the light on the go 

Positive Control - Activate the light easily with or without wearing gloves

Unlimited Battery - Use the light as much as you want and just charge it via a USB cord

Features:

• 300 - 1500 Lumens
• 19600 Candela
• USB Rechargeable Batteries
• 3.25 oz
• 1.44 in
• IPX6

See detailed PL PRO reviews here

Olight BALDR PRO R - Best Laser For Glock 21

Why Get Olight BALDR PRO R - This is the best full size light and laser combo for the Canik TP9 with unlimited battery recharging capability for more training usage.  

3 Modes - Mode selectors are redesigned as a ring dial to minimize external switches that can pose snag hazard

Quick Detach - Quickly mount or demount the light on the go without any tool

Save Money On Batteries – Recharge the light via USB cable just like other Olight products, so you can train as much as you like without buying extra batteries

Features:

• 600 Lumens
• 2500 Candela
• Wide Spill + Tight Hot Spot
• USB Rechargeable Batteries
• 2.57 oz
• 1.26 in
• IPX7