Here are 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 - Best Overall

glock with streamlight tlr 1 hl light

The Streamlight TLR 1 the most popular weapon light for Glock 21. 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


  • 1000 Lumens
  • 15000 Candela
  • 2 CR123A Batteries
  • 4.18 oz
  • 3.39 in
  • IPX7


  • Very affordable 
  • Duty grade light
  • High lumen & candela output
  • Easy to mount and demount
  • Easy to toggle switches for one handed use


  • So many mount keys provided, may lose them
  • Still runs on 2 CR123A batteries

Surefire XH30 - 2nd Best Duty Light

xh30 on glock 17

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

glock 17 with surefire xh30 TIR beam pattern

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.


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

See detailed XH30 reviews here


  • Duty grade light
  • Very wide flood beam
  • Easy to mount and demount
  • Strobe mode added that X300U doesn't feature


  • Stiff control switches
  • Doesn't fit existing X300U holster
  • Slightly pricier than TLR 1

Olight PL Pro - Best For Training

Olight PL PRO on glock 17 right side view

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


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

See detailed PL PRO reviews here


  • Recharge any time - huge savings on batteries
  • Easy to mount and demount
  • Very bright light beam for training


  • Hard to find holsters (More products coming)
  • Two button press required for strobe
  • Not duty use

Olight BALDR PRO R - Best Laser For Glock 21

olight baldr pro r bottom view

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


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


  • Battery is rechargeable
  • Laser pointer now built into the reflector to minimize the overall light size
  • Quick detach for fast light swap when needed


  • Strobe mode activation is a bit complicated