FireflyLite E07X Canon FFL351A HI

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FireflyLite E07X Canon FFL351A HI specifications

Brand & Model	FireflyLite E07X Canon FFL351A HI
Flashlight category	High Output General Purpose
LED	7*FFL351A HI
Max. output	5,000 lumens
Max. beam distance	? meters
Max. beam intensity	?
Battery config.	21700
Onboard charging	USB-C
Main modes	Many, Anduril 2
Blinkies	Many
Waterproof	IPX8
Review publication date	February 2024

Round four? Yep, another new E07X sent over from our good friends at FireflyLite. I really enjoyed the all-new refreshed lights, along with the all new FifelyLite X1S and FireflyLite NOV-Mu V2. Overall, these represent a nice upgrade to the flagship lights from FireflyLite Outdoors after a long hiatus. To go with the new host, FireflyLite added an LED exclusive to the brand. This E07X has those, and they promise to be good, and you better believe I’m going to test that. This review ‘borrows’ points and content from the first E07X review, so bear with me.

What’s in the package

Since the E07X has represented the upper-end of FireflyLite’s product line, but the packaging was a bit anticlimactic. Yep, just a box with some graphics. No fancy magnet or laminated cardboard. That’s fine though. Here’s what’s inside:

• FireflyLite E07X Wine Red FFL351A
• 4 o-rings
• Instruction guide for the UI
• Lanyard with split ring and quick release clip
• 3 spare lenses

FireflyLite sent this light with extra lenses for the MAO E07X test light which had defective lenses, so a big thanks to Jack, Ivy, and the gang. The lanyard is the same rubbery, Slinky coil type as the other lights FireflyLite sent. It has a quick release clip on one end, and a split ring for a keying on the other. No battery was in the light this time, but a VapCell T50 is an optional add-on (just get it). Interestingly, there’s no USB C cable in here, but you probably already have one anyway.

The E07X is a high output, general purpose enthusiast flashlight. The new one has grown in some dimensions, and shrunk in others. It’s wider, but shorter, but it’s still a 21700 size tube light. It looks awesome, almost beautiful. To go with good looks, it handles nicely too. For pocket carry, you get a stainless clip. It’s a collar type and retained by the tailcap. After some time riding in my pocket, I think it’s a little portly for regular EDC use. A cargo pocket is a nice home for it though.The aggressive hand grenade texture on the tube is an excellent gripping surface. The test light didn’t include the magnetic tailcap (fine by me-I am not a fan of those for anything other than work lights), but one is optional. The lanyard was pretty useful, but the Slinky-likeness took getting used to.

The head has 5 deep heat sinking fins for dissipating heat. For switching, you get an e-switch mounted in the middle of the head. I had no trouble reaching it from all grip angles. It has a beautiful black PVD (FireflyLite calls it diamond black VEP) stainless steel button (matches the bezel) with a central LED indicator for on-state and charging. The switch LED is of course configurable through the UI, along with the front RGB aux LED array under the optic. The click action is very good, with slightly soft, but positive clicks with good feedback and feel. The USB-C charging port cover is also stainless VEP coated in the same black color. The charge port is a brand new and patented design with a magnetic closure, and according to FireflyLite, it’s fully waterproof even when the port is open. 

Build quality? Despite the issue with the first E07X, this one has been trouble-free with no gremlins or issues.

NOTE that we were contacted by FireflyLite about an issue with the optic specific to the FFL351A version of th eE07X. I didn’t notice an issue, and FireflyLite didn’t elaborate, other than an issue with the ‘focus.’ They are sending a replacement optic and the review will be updated when received.

As of today (with a 25% discount), a base light with the FFL351A LEDs comes in at $96 US. Add Cree LEDs and it jumps $13 US. Adding a VapCell T50 battery and extra tailcap bumps it to $120 US. I expect the price will go up, so get these while you can. The light is milled from 6063-T6 aluminum alloy and that’s good. 6063 aluminum takes a nicer surface finish, is more corrosion resistant, and has superior electrical conductivity and thermal properties. The machining is exquisite with no issues with no sharp edges.

The finish is also new. You get a choice of two MOA (micro arc anodizing) finishes, fossil gray and dark white, and a standard matte black type III HA. Navy Blue and Wine Red were recently added to the color selection. This one came in the Wine Red anodizing, and it looks beautiful. The finish isn’t advertised as type III HA, but it’s been durable so far. It’s a semi-gloss finish and doesn’t really add much tack, but it’s pleasant to grip. The finish had no blemishes or odd colors, and the graphics are nicely etched with nice contrast. 

The light can be fully disassembled, which is nice if you want to mod it further or just do your own maintenance. Like the other lights, even though the threads were lubed, unscrewing the tailcap and the head took what seemed like excessive amounts of effort. The first 3 turns go pretty smooth, but the last 2 turns require what seems like excessive amounts of force. I added more lube to the o-rings, and it helped, but it still took more effort than I like. Adding SuperLube to the o-rings helped, but it’s still tight.

The threads have been redesigned. They’re fully anodized T-shape threads (more like rectangular) and they’re very precisely cut. There’s o-rings sealing every joint as well: Both ends of the tube, bezel, and the lens. The IP rating has been upgraded to IPX8, up from IP66. This is a nice upgrade, even though not the proper IP68 I see on other higher-end lights. For springs, you get a driver spring and a tailcap spring. They’re nonmagnetic copper alloy with a silver plating, and plenty thick for good current handling. 

For the warranty, I couldn’t find anything on the FireflyLite website, but their old website, ff-light.com, does list warranty information, so take it away FF-light! We provide 3 years’ manufactory warranty to fireflies flashlights. (Consumable batteries are not in warranty. ) DOA products can be returned and refunded within 15 days, We will bear all the returning shipping cost.

The LED arrangement is unchanged here, with 7 LEDs under a TIR lens. LED choices as of this writing, include the Cree XP-L2 HI (probably XP-L HI), 2 flavors of Nichia 519A (5000K and 2700K), Osram W1, and the test light’s FFL315A HI LEDs. It’s okay, I’d never heard of these either, but supposedly these are domeless warm white high CRI analogues of the Cree XP-L HI, which was never offered in this tint or R9 values. I don’t know much about these, other than that they look to be CSP type LEDs, with a substrate totally coated in phosphor, a bit like the Nichia E21A or 719A. FireflyLite says these are good for 5000 Lumens.

Under the TIR you get a bunch of RGB aux LEDs. These are mostly for fun, but they do help with locating the light in the dark, and do work great when very low light output is needed (especially with the red ones). They are totally configurable with the UI. You can get them to show battery voltage, or blink during battery or thermal calibration instead of the main LEDs, which is a nice feature.

The TIR is unchanged from the prior model. It’s sourced from Ledil and this one is the Anna, a single piece of PMMA with an array of integrated TIR lenses. The combined beam angle is 10 degrees. This gives a bit tighter hotspot and a little more beam distance, and it’s noticeable. The beam is nice, with a defined hotspot and decent side illumination with more than enough beam distance for general purpose. The tint is gorgeous: Nice and rosy with a pleasant tint. I’m not a tint snob by any means and prefer cooler tints , but this one looks great. Topping that optic is a gorgeous VEP coated black stainless bezel and a dual-layer AR coated mineral glass lens. The bezel is mildly crenulated and does offer some protection to the lens. 

NOTE that we were contacted by FireflyLite about an issue with the optic specific to the FFL351A version of th eE07X. I didn’t notice an issue, and FireflyLite didn’t elaborate, other than an issue with the ‘focus.’ They are sending a replacement optic and the review will be updated when received.

Spectral measurements: 

I used an Opple Lightmaster Pro to measure the flashlight at 1 meters from the sensor 

Mode:	CCT:	CRI Ra:	duv
Turbo	3684 K	95.5	-0.0057

The E07X redesign has resulted in some shrinkage and growth. It’s shorter and the head is a bit bigger at 40 mm. 

Dimensions: 

E07X FFL351A	Millimeters	Inches
Length	109 mm	4.3 in
Head diameter	40 mm	1.6 in
Body diameter	26.5 mm	1 in

Dimensions are rounded to the nearest millimeter and the nearest tenth of an Inch.

Weight: 

E07X FFL351A	Weight in grams	Weight in oz
With battery	204 g	7.2 oz
Without battery	134 g	4.7 oz

Weight is rounded to the nearest gram and tenth of an Oz.

Flashlight size comparison with its competition:

Group 1 left to right: Fireflies E07 2021 Edition, E07X FFL351A, E07X Dark White MAO

Group 2 left to right: FireflyLite X1S Pharos, Fireflies E07 2021 Edition, FireflyLite E07X FFL351A, FireflyLite E07X Canon, FireflyLite NOV-Mu v2

Group 3 left to right: Wurkkos TS25, FireflyLite E07X FFL351A, Emisar D1 V2, Fireflies PL09MU

The Loneoceans Lume1 driver has been carried over from the outgoing E07X Pro. This one’s been tweaked by FireflyLite for an efficiency bump. This driver is an Attiny1616-based 6A buck+FET design. You’d get a max of 6 amps fully regulated output and direct drive FET for Turbo. This is great for Anduril lights where the max ramp brightness could be regulated up to 6 amps, which can give higher sustained outputs (within thermal tolerance though).

The UI is ToyKeeper’s Anduril 2 and needs no introduction. While everyone who reads my reviews knows, I am not a huge Anduril fan and prefer simpler UIs, but this is an enthusiast light and not putting Anduril 2 on it would be like going to a Van Halen concert without wearing a tattered denim jacket, pleather pants, and piercings. This version of Anduril 2 is the newest one, with a unique ‘soft start’ when turning on/off and changing modes in the stepped ramping.

Additional/summary info on the UI: 

• Even though it’s nice and has a lot of features, with arguably the best smooth/stepped ramping functionality of any flashlight UI, Anduril 2 isn’t my favorite UI, and I’ll always take a well thought-out UI over the infinitely complicated and tweakable Anduril UI. The light came set to Advanced UI out of the box with the ambient temp sensor pre calibrated to ambient, and it’s within 1-2 C.
• The thermal limit? FireflyLite says it’s set to 50 C, and unlike the MAO 519A version of this light I tested, this one actually works, and steps down closer to the predefined thermal ceiling with no timed step down. I’m not sure why FireflyLite did that on the MAO version with 519A’s, but not this one. Oh well.

The E07X takes a 21700 size battery, and it’s an optional add-on (the VapCell T50). The light can accommodate up to a 71 mm cell, and that’s accurate since I couldn’t get standard button tops to fit properly (tailcap wouldn’t fully seat). I’m fine with that though since you don’t need protected cells. The Lume1 driver adds USB type C charging, and FireflyLite has modernized it with a magnetic charge port cover.

FireflyLite patented this one, and says the charge port maintains the IP rating even when open. This addresses a major issue with onboard charging, namely if the charge port fails somehow (or is left open) and water, dirt, or detritus gets in the port. The charging speed is unchanged from before, with up to 2 amps on tap. On the Ruideng AT35 USB A tester and Hidance USB C tester, I got a bonafide 5 volts 2+ amps.

Charge type	Fits	No fit	Charge time
Onboard USB-C	Standard flat tops	71 mm long 21700s	For a 5 Ah cell, about 3 hrs

Lumen measurements

How Lumens are Measured: Understanding ANSI FL1 Standards How Lumens are Measured: Understanding ANSI FL1 Standards: The ANSI FL1 standards specify that output in lumens should be measured 30 seconds after turning on, as this is the standardized time for measuring brightness according to the industry standard. This is why we focus on this part in our measurements. The ANSI FL1 standards require an ambient temperature of 22 ± 3°C. We record the ambient the ambient temperature to identify potential reasons for any observed discrepancies.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. I use a Thisinde B18B+ multimeter with 14 gauge wire on banana plugs in the meter for low current and my FY219 clamp meter for higher currents over 200 mA. and tested the stepped modes in the Advanced UI. I set the thermal ceiling to 65 C this time for the test. I used the same VapCell T50 for the testing.

Mode	Amps at start	Specified	0 sec.	30 sec.	10 min.
L1	2.58 mA	?	N/A	N/A	–
L2	18 mA	?	6	N/A	–
L3	140 mA	?	78	78	–
L4	660 mA	?	319	319	–
L5	1.99 A	?	828	819	774
L6	5.13 A	?	1782	1728	873
Turbo	20.1 A	5000	4320	3870	810

Ambient temperature during testing:

•  19.8 °C 

Parasitic drain:

• Aux LEDs on: 1.43 mA 
• Aux LEDs off: .01 mA

FireflyLite lists 5000 Lumen output for the FFL351A HI LEDs on the product page, but I’m coming up short like the 519A version. L1 and L2 were too dim and didn’t register on the luxmeter.

FireflyLite E07X FFL351A Battery Life: Runtime graphs

How Runtimes are Measured: Understanding ANSI FL1 Standards About ANSI FL1 runtime standards: The runtime is measured until the light drops to 10% of its initial output (30 seconds after turning on). This does not mean that the flashlight is not usable anymore. The last column shows how long the light actually works till it shuts off. If there is a + symbol, it means that the test was stopped at that particular point, but the light was actually still running. This happens on certain occasions, with certain drivers, firmware, or batteries.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. I use a Digi-Sense 20250-92 data logging thermocouple for the temperature measurements. The probe is affixed to the head using kapton tape and uses the same 5 second sampling rate for logging. I tested stepped modes L5, L6 and Turbo in Advanced UI. The thermal limit was set to 65 C for the testing and I used the VapCell T50 battery.

Mode	Specified	Runtime (ANSI FL1)	Time till shut off
L5	?	1h 58m	2h 18m*
L6	?	2h 9m	2h 25m*
Turbo	?	2h 2m	2h 7m*

*The light was still running at a very low level when the test was terminated

There’s definitely a fully regulated driver at work here, and the output is regulated well for all the tested modes like the MAO 519A version I tested. This version, as mentioned, doesn’t have the timed stepdown like that light does though, so it holds Turbo a bit longer (about 20 extra seconds) before stepping down. With the high thermal limit, the light is too hot to handle by about 5 minutes in, with the tube hitting over 50 C. Like all Anduril lights, the output steps down three times for LVP, with the last one stepping down to about 0.5 Lumens and runs forever, so this is where I end the tests.

The battery was consistently discharged to 2.9 volts, and the light was usable after every runtime test. For the comparison graph, you can see the improvement the fully regulated output from the Lume1 driver makes versus the unregulated E07 2021 Edition and Wurkkos TS25. The E07 tromps this light in initial output, but I’ll take regulated output any day over that.

The Acebeam E75 has lower initial output, but maintains a higher output for longer using just 4* Nichia 519A LEDs. Here’s some performance comparison graphs

Peak beam intensity and beam distance measurements

About Peak beam intensity: Understanding ANSI FL1 Standards About peak beam intensity The calculated value of distance in meters at which the flashlight produces a light intensity of 0.25 lux. (0.25 lux is about the brightness of a full moon shining on an object). This means that the intensity has decreased so much, it becomes difficult to see darker objects, or objects that don’t reflect light. The columns ‘Meters’ and ‘Yards’ use rounded numbers.

Beam distances are measured using a Uni-T UT383S luxmeter measured indoors at 5 meters using the included fully charged battery. Measurements taken at 30 seconds using the VapCell T50. The battery was topped off and the light allowed to cool between the L6 and Turbo measurements.

Mode	Specified	Candela measured	Meters	Yards
L1	?	N/A	N/A	N/A
L2	?	N/A	N/A	N/A
L3	?	250 cd	32 m	35
L4	?	1050 cd	65	71
L5	?	2975 cd	109	119
L6	?	6250 cd	158	173
Turbo	?	14,300 cd	239	261
*Turbo @ start	?	16,250 cd	255	279

Ambient temperature:

•  19.5 °C 

FireflyLite doesn’t list beam distance specs for these FFL351A HI LEDs. They’ve netted a negligible improvement over the domed 519A, which are not throwy LEDs in any way shape or form. Even in the 10 degree optic, this isn’t a lot of beam distance, but it’s more than enough for general purpose tasks. If you need more throw, opt for the W1 equipped E07X.

Camera settings and distance: Photos taken with a Canon EOS R100 and Canon R-FS 18-45mm STM lens set to 0.3s, F5 ISO 1600 and 5000K WB.The fence is 95 meters away. The trees beyond the fence are about 150 meters distant.

Beamshots of the following flashlights compared:

• FireflyLite E07X with FFL351A LEDs
• FireflyLite E07X with Nichia 519A LEDs
• Astrolux MF01 Mini
• Fireflies E07 2021 Edition (Cree XP-L HI)
• Wurkkos TS25
• Acebeam E75

Please note that the following beamshots are mainly intended to showcase the beam pattern and beam quality, rather than overall performance. These images are typically taken directly after activation, and in different seasons or weather conditions, and therefore do not fully represent its overall performance. For accurate performance metrics, such as output, beam distance, and runtimes, you need to look at the performance section of this review.

Disclaimer: This flashlight was sent to us for review at no cost by FireflyLite. We have not been paid to review, nor have we been holding back on problems or defects.