Streamlight vs Surefire

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Recently, we set out to find the best AR-15 flashlights on the market today, and the two names still stick out as the most popular are Streamlight and Surefire. So, I decided it was time to put these flashlights head-to-head in this Streamlight vs Surefire comparison.


Two of the most popular AR-15 weapon-mounted flashlights from the Streamlight and Surefire offerings are the Streamlight ProTac HL-X and the Surefire X600U.

So for this comparison, we will compare these two lights since they are no contest the favorites in the two companies’ product lineup for AR-15 weapon-mounted flashlights.

Stats Comparison

For this Streamlight vs Surefire comparison, we will take the manufacturers’ specifications from their respective websites, place them side-by-side, and run down each section.

Streamlight ProTac HL-XSurefire X600U
High Runtime75 minutes75 minutes
Battery Type123A lithium x 2123A lithium x 2
Beam Distance332 meters213 meters
Weight6.4 oz4.8 oz


Both the Surefire X600U and the Streamlight ProTac HL clock in at 1,000 lumens. While lumens are important, there is more to light than just lumen count.

Up until recently, Lumens were seen as the gold standard of determining flashlight brightness and people would tout their lumens to determine the best light.

But lumens leave out candela as well as beam throw and shape so we won’t get caught up on the lumens, which are the same anyway.

High Runtime

If you are new to AR-15’s or weapon-mounted flashlights this term might not make sense to you.

But for the newbies to the game, high runtime is how long the flashlight will run at its highest available output before starting to dim.

Common sense will tell you that a battery-powered item can’t run for an indefinite amount of time. So when the battery output starts to weaken so will the lights output.

But the nice part about these two flashlights is they have the same high output runtime of 75 minutes.

Battery Type

Both, the X600U and the ProTac HL-X use 2 of the same 123A lithium batteries for power.

However, both Surefire and Streamlight have created their own rechargeable battery options.

Surefire offers their Streamlight SL-B26 Li-Ion USB Rechargeable Battery Pack for the ProTac HL-X.

Surefire offers a 123A Rechargeable battery set with a charger as well. Surefire does make an M600DF; the DF, standing for dual fuel, offers a single rechargeable battery called the SF18650B. But keep in mind these do not work for the standard M600U.


Candela, also known as candlepower, is used to determine the value of light that is concentrated into a single point. That is the light projected from a high-intensity beam in a single direction.

The candela can have a lot to do with the spill of your flashlight. The spill is typically what you call the light around the center of your flashlight beam.

The candela numbers are really where these two lights differ in their overall stats.

When it comes to the Streamlight vs Surefire competition, the Streamlight clocks in at 27,600 candela, whereas the Surefire comes in at 11,300 candela.

Beam Distance

The beam distance can vary greatly depending on conditions and battery levels. Once again this is where the stats on these two lights are different.

Surefire comes in a little lower at 213 meters, or almost 700 feet or 232 yards, and the Streamlight comes in at 332 meters, or right at 1,089 feet or 363 yards.

As you can see the ProTac HL-X’s beam edges out the M600U’s beam distance by 119 meters.

But let’s look at them both with brand-new batteries at several different distances.


The length of the flashlights typically doesn’t matter a lot unless you’re trying to build an extremely compact setup.

Both lights come in right at 5.5″ so there is no clear winner on length.


The weight difference of the Streamlight vs Surefire is about 2 ounces, with the Surefire taking the win on the lightest weapon-mounted light of the two.

Weight can be a big deal regarding your weapon-mounted light because they often add to the front-end weight of your gun.

This can affect accuracy as well as the ability to hold the weapon on target for long periods.

However, 2 ounces may not make or break most people or have a noticeable difference for many.

Features Comparison


Both Surefire and Streamlight options come with 1913 rail mount adaptors. Both of these are sufficient if you are running a 1913 mount.

The nice thing about these two lights is their mount screw patterns are the exact same. So if you have a favorite mount, for me the Arisaka offset scout mount, you can use it for either of these options.

Most people don’t run a 1913 rail on their gun anymore, so the M-Lok mounting solutions available are extensive.

Activation Switches

The Surefire vs Streamlight activation switch debate has been going on for years and years.

My personal preference is neither of the tape switches. I usually upgrade my Surefire M600 tape switch to the SR07, yes it’s expensive but it’s worth it to me.

Streamlight vs Surefire activation Switches

The included Streamlight tape switch is decent but it’s not a home run. The attachment system for the activation switch to the 1913 rail is horrible. These two plastic pieces are probably the worst design imaginable.

If you run a Streamlight, I highly recommend grabbing a Cloud Defensive LCS to mount your Streamlight activation switch.


The one thing that stands out about these two flashlights is that the Surefire, the “higher-end” flashlight, has no modes.

The Streamlight comes with 3 modes: high, low, and strobe. If modes are an essential function, then you probably already know your winner.

For me, the modes are nice but not required.

Usage Comparison

I took several photos and a video using these flashlights side-by-side so you can decide which you’d rather have.

streamlight protacsurefire m600
Streamlight ProTac HL-X (left) vs Surefire M600U (right)

But in a nutshell, the Surefire has less spill and a more direct beam, whereas the Streamlight has more light spill and a less focused beam.

Cost Comparison

Cost is always a factor when comparing two different products. For some, it’s the biggest factor, but features, value, and durability are the key for others.

Surefire M600UStreamlight ProTac HL-X

That’s a whopping $180 difference between the two AR-15-mounted flashlight systems.

So, if you’ve read through this whole article and seen the numbers you’re probably wondering, how can this be?

The cheaper of the two lights is edging out the Surefire on most categories.

One does have to ask, are you simply paying for the brand name “Surefire” when it comes to these two lights?

Streamlight vs Surefire Winner

Choosing a clear “winner” is difficult and it wouldn’t seem that way up to this point because the Streamlight ProTac HL-X wins more of the stat categories than the Surefire M600 Ultra.

But the one thing we haven’t covered is durability.

Durability and Application

While it’s hard to say what’s more durable, what is undisputed is that the Surefire M600U has been battle-tested in some of the harshest environments known to man.

The Streamlight ProTac HL-X is a favorite among domestic law enforcement agencies and sees many users worldwide.

But I have a feeling if you were to ask any US Military personnel what flashlight they want to take into combat with them, they are going to say Surefire M600U, and that’s likely not because of the price, because when your life is on the line you rarely care about the cost of your gear.

But you want it to work and work correctly.

That doesn’t mean the Streamlight won’t meet your needs but I think the Surefire M600U is a more tested and durable flashlight system.

Both companies make some of the best tactical flashlights on the market.

Product Origin

Last but not least, the Surefire M600U is a product designed and Made in the USA. The Streamlight ProTac HL-X is a product that is Made in China.

As the owner of the Made in the USA company, this fact is extremely important to me. I will pay more to support a company manufacturing here in the USA simply because they support families here at home.

If this isn’t important to you or doesn’t help you justify that $180 price difference, I completely understand, and you should still buy whatever light you feel meets your needs at your price point.

Features Winner: Streamlight ProTac HL-X
Price/Value Winner: Streamlight ProTac HL-X
Downrange Time Winner: Surefire M600U
Overall Quality Winner: Surefire M600U

Surefire M600 Ultra
Check Prices
1000 Lumens
75-minute Runtime
11,300 Candela
Build Quality
Attachment Options
streamlight protac
Streamlight Protac
Check Prices
1000 Lumens
75-minute Runtime
27,600 Candela
Pressure switch isn’t the best

Is Streamlight or SureFire better?

This isn’t an easy question to answer, and since nearly $200 separates these two products, it’s best to drill down and see which weapon-mounted flashlight meets your needs.

Michael Savage
Michael Savage

Michael is the President of Lynx Defense and an avid gun owner and outdoors man. He's passionate about helping find the best bang for your buck and helping others learn about firearms and the industry as a whole.

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  1. Many tours oif/oef have had both. Both are extremely reliable. Never experienced a failure. I lean heavily towards the streamlight but agree on after market switch upgrade

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