Fireflylyte E07X FF351A 1800k and X1L Elite XHP70.3 HI 4500k 90CRI

[SKV89]

A few days ago, I received the FF E07x with the new FFL351A 1800k emitters and X1L XHP70.3 HI 4500k and had time to extensively use the E07x.

For the past 7 or so years I’ve been wishing for a high power 90+ CRI 1800k candle light and camp fire simulator. The only ultra warm hi CRI emitters that existed in this category were the Nichia E17A 1800k and E21A 2000k but those were not high powered and were found in only a few lights. There is also the GT-FC40 1800k emitters but their tint is so far above the BBL (+0.070 duv) makes it look nothing like candle light and is horribly yellow and I hate yellow or green tint. I was afraid this new FF 1800k emitter would be like the GT-FC40 1800k but thank God the tint and performance is similar to the Nichias but much higher power. The DUV is basically zero, which is perfect for ultra warm candle light simulators since candle light and campfires have DUV of zero. I normally like negative DUV but only for higher CCT lights, for ultra warms, DUV between 0 to -0.002 is ideal. Too far below the BBL, and the tint won’t look natural.

For those wondering what are some benefits or reasons for using ultra-warm lights. Here are a few off the top of my head.

1. exposure to blue light at night, especially from bright lights suppresses melatonin production (a hormone that regulates sleep and has anti-cancer properties) and increases cancer risk. There are sleep bulbs on the market that are advertised to help you fall asleep and reduce insomnia but all it really is, is an ultra warm cct light bulb and the ones I’ve tried in the past are all yucky yellow due to the very positive DUV, which is similar to the GT-FC40 1800k.

2. Some children prefer to sleep with lights on or at least with a night light, but blue wavelengths can inhibit their melatonin levels and hence reduce grown hormone production. I’ve been using a E21A 2000k flashlight as night light in my kids’ room but will be switching to the 1800k.

3. Insects are attracted to blue light. If you use a CW, NW, or even conventional WW light during camping or night hiking, you will notice how it attracts annoying insects. Using an ultra WW light will alleviate this problem.

4. Many nocturnal animals are extremely sensitive to blue light because they will detect it as sunlight or danger and will hide immediately when they detect blue light. Blue light at night can also harm or misorient many nocturnal animals. And of course for anyone that enjoys the feeling of being immersed in candle light or camp fire atmosphere will surely appreciate a clean tinted hi CRI Ultra Warm light. For me, this light is like a dream come true and I find myself constantly playing with this E07x daytime and night time! Anduril’s candle mode complements this 1800k light perfectly to create the ambiance of a flickering candle or cozy fireplace. The wine red E07x is also one of the most beautiful lights I’ve ever owned, looks much better in person than in my photos.

5. Blue light hurts your night vision. The less blue light, the better you can preserve your night vision. Using an ultrawarm light can achieve this and still perfectly render colors unlike monochromatic red or amber LEDs that are normally used for this purpose.

6. Blue light has a shorter wavelength than other colors of light, so it scatters more when it hits water particles in fog. This scattering can reduce your ability to see through the fog, and it can also increase glare because blue light scatters better inside your eyes. Lights with less blue wave length will pierce better through the fog.

I do have suggestions for FF to further improve this light though. While the LUME driver is one of the best and most efficient regulated flashlight drivers, I just wish we can have a FET turbo mode to allow the output to go all out like the original unregulated E07. Also FF might consider offering optional Green AR lens (that blocks green tint) to lower the DUV. Right now the duv is about 0.008. A green AR lens should bring the tint down just enough to reach 0.000. I’m just being nitpicky here.

EDIT: I just realized it does have Green AR coated glass lens. Now I just wish there is an optional stronger Green AR coated lens to lower the DUV further.

Below are my light measurements using the Texas Ace Lumen Tube and Sekonic C-800-U spectrometer. Please note that light meters are less sensitive to warm cct and reads higher lumens for cool cct so actual lumens should be a bit higher than measured if comparing to cooler temp lights. I included two other ultra warm category lights for comparison.

FF E07x Canon with FFL351A 1800K	Turbo	2,647 lumens	2008K	0.0013 DUV	95.9 CRI	Blue light relative amplitude 0.06	74.4 R9	89.4 R12	93 Rf	97 Rg	Vapcell T50S
FF E07x Canon with FFL351A 1800K	Top of Ramp	1,003 lumens	1964K	0.0008 DUV	94.8 CRI	Blue light relative amplitude 0.05	79.6 R9	84.0 R12	92 Rf	97 Rg	Vapcell T50S
FF E07x Canon with FFL351A	Random level	463 lumens	1912K	0.0007 DUV	94.1 CRI	Blue light relative amplitude 0.05	77.5 R9	81.1 R12	92 Rf	97 Rg	Vapcell T50S
FF E07x Canon with FFL351A	Random level	168 lumens	1905K	0.0008 DUV	93.8 CRI	Blue light relative amplitude 0.04	79.7 R9	79.5 R12	92 Rf	98 Rg	Vapcell T50S
FF E07x Canon with FFL351A	Random level	42 lumens	1880K	-0.0003 DUV	93.5 CRI	Blue light relative amplitude 0.04	82.4 R9	77.9 R12	91 Rf	98 Rg	Vapcell T50S
FF E07x Canon with FFL351A	Random level	3 lumens	1838K	-0.0006 DUV	92.9 CRI	Blue light relative amplitude 0.03	82.6 R9	74.4 R12	91 Rf	99 Rg	Vapcell T50S
FF X1L Elite XHP70.3 HI 4500K	Turbo	2,828 lumens	5461K	0.0024 DUV	88.9 CRI	Blue light relative amplitude 1.00	55.5 R9	72.9 R12	87 Rf	100 Rg	Vapcell F56 5600mah
FF X1L Elite XHP70.3 HI 4500K	Top of Ramp	1,776 lumens	5382K	0.0027 DUV	89.8 CRI	Blue light relative amplitude 1.00	58.6 R9	72.3 R12	88 Rf	100 Rg	Vapcell F56 5600mah
FF X1L Elite XHP70.3 HI 4500K	Random level	819 lumens	4987K	0.0050 DUV	90.4 CRI	Blue light relative amplitude 1.00	58.3 R9	65.8 R12	89 Rf	98 Rg	Vapcell F56 5600mah
FF X1L Elite XHP70.3 HI 4500K	Random level	7 lumens	4865K	0.0058 DUV	92.1 CRI	Blue light relative amplitude 1.00	66.7 R9	63.7 R12	88 Rf	96 Rg	Vapcell F56 5600mah
Emisar D4K E17A 1850k	Turbo	525 lumens	1851K	-0.0012 DUV	95.0 CRI	Blue light relative amplitude 0.05	79.1 R9	83.3 R12	92 Rf	103 Rg	Vapcell G58 5800mah
Emisar D4K E17A 1850k	Top of Ramp	327 lumens	1872K	-0.0010 DUV	94.7 CRI	Blue light relative amplitude 0.04	85.9 R9	81.7 R12	93 Rf	102 Rg	Vapcell G58 5800mah
Emisar D4K E17A 1850k	Random level	139 lumens	1868K	-0.0008 DUV	94.2 CRI	Blue light relative amplitude 0.04	90.7 R9	79.6 R12	93 Rf	101 Rg	Vapcell G58 5800mah
Emisar D4K E17A 1850k	Random level	38 lumens	1853K	-0.0007 DUV	93.9 CRI	Blue light relative amplitude 0.04	92.5 R9	77.5 R12	93 Rf	101 Rg	Vapcell G58 5800mah
Emisar D4K E17A 1850k	Random level	3 lumens	1836K	-0.0006 DUV	93.7 CRI	Blue light relative amplitude 0.04	93.0 R9	76.2 R12	92 Rf	100 Rg	Vapcell G58 5800mah

[sidpost]

Interesting thoughts on the new E07X and warm emitters.

[Kona_G]

No fitment issues running cell without clip spacing the tailcap outward?

I am not fan of clips on larger diameter flashlight. But sure would’ve been nice if FF had them PVD blackened

Nice photos and write up!

[SKV89]

No issues with battery fitment with or without clips. I took out the clips because I never use them and I like it as compact as possible.

[Kona_G]

Has anyone suggested to Jack offering his lastest models sold in parts?

I have a E07X on order FF351A 5000k black ano. Planning for outdoor camping use

It would be very cool to buy just a head with light engine,1800k CCT as an option

Modular, kinda like Malkoff but without the high US prices?

[SKV89]

You can ask him directly but I doubt there will be much of a price difference between the tube is cheap. Everything expensive is in the head.

[Sirstinky]

In my tests I was overall impressed with the ffl351a LEDs. They bridged the space between the 519a and the xp-l HI (which isn’t offered in anything below 4000K that i know of). The tint is very good and is more red than green/yellow in the 4000K. They were slightly brighter and ran a little better in the E07x than the 5000K 519a. I like warm tints and the sweet spot is somewhere in the 2800-3800K range (with -duv of course). LED manufacturers are getting better at that, but there’s still too few options for higher output levels .

[Kona_G]

Are the new FFL models heads potted?

[Sari33]

Are available variable CCT flaslights with these Leds? 1800 + 4000k sound interesting

[Sirstinky]

Not that I know of. Unless they’ve changed anything, bi they’re not potted.

[Sari33]

1964K at 1000LM x7 leds mean that each Led at only ~150lm bump +150K from claimed 1800k.
Visually is noticeable warmer than DD 519A 2700k?