4 Best Glock 21 Light Options

We have narrowed down best Glock 21 weapon light options. These products are judged based on lumen / candela output 

There are much more powerful lights with increased lumen and candela, available now!

Check them out below:

Top 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.

streamlight tlr 1 hl beam pattern drone shot

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

Why pick this one - The 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

Compare Deals:



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

Compare Deals:



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