This Sofirn SP10 Pro was provided by Sofirn for review. This one got lost in the shuffle for a while - apologies for the delay.

Overview

The Sofirn SP10 Pro is a budget everyday carry flashlight using a 14500 Li-ion or AA battery and running ToyKeeper's Anduril firmware. Its Samsung LED has good color rendering and a sunlight-like 5000K color temperature, but suffers from green tint. It has the lowest moonlight of any flashlight I've used, and an impressive maximum output. Efficiency is good given the small size and high CRI in its medium modes, but unimpressive on high. The pocket clip could use more ramp, and output is not perfectly regulated with a 14500 battery, but that's to be expected at such a low price point.

With a regular price just over $20 and occasional discounts below that, the SP10 Pro offers a lot and is recommended.

Specifications

Spec	-
Battery	1x14500, 1xAA
LED	Samsung LH351D
Color temperature	5322K
Color rendering index	89
Max output (14500)	947lm
Max throw (14500)	157m
Max output (AA)	403lm
Max throw (AA)	102m
Max sustainable output (14500)	473lm [1]
Max output at 50% battery (14500)	765lm
Max sustainable output (AA)	340lm
Best efficiency	108 lm/W
Candela per lumen	6.5 (floody)
Length	88mm
Head diameter	20.5mm
Weight	40g
Low Voltage Protection (LVP)	Yes
Lockout	Mechanical and electronic
Approximate price	$22 ($24 with battery and charger)
Rating	★★★★☆ (recommended)

[1] Output is not stable with 14500 batteries

Highlights

• Anduril UI (in simple mode by default)
• High CRI
• Impressive maximum output with both battery types
• Great regulation with AA
• Flashing pads allow firmware updates (with additional hardware)

Lowlights

• Green tint
• Flat-top 14500s don't work
• Poor regulation with 14500
• Pocket clip needs more ramp
• Temperature sensor was not calibrated

Details and technical analysis

Versions

The SP10 Pro comes in several body colors, currently black, blue, green, and red.

Accessories

The SP10 Pro includes a lanyard and spare O-rings. A 14500 battery and USB charger is optional for $2 extra, which is a good value.

Modes and user interface

The Anduril 2.0 firmware deserves its own article. Its advanced mode offers a great deal of customization, including min/max level, smooth ramp or a configurable number of steps, calibration and adjustment of the thermal throttling behavior, and special modes like candle and lightning storm simulations.

Anduril also offers a simple mode, which operates similarly to mainstream brands like Acebeam, Thrunite, and Olight.

Here's a UI diagram from Lux-Perpetua on BLF.

And the official manual.

Output, runtime, and efficiency

As received, the thermal calibration was significantly off, indicating 32C when the temperature was actually 18C. It is necessary to calibrate the light to get reasonable thermal management behavior. Runtimes were generated after calibration unless otherwise noted.

Anduril does not have fixed modes; the configuration of the light determines not only the number of modes, but their levels. Testing was conducted in a stepped, 7-mode configuration.

AA battery

Mesurements were taken using a Panasonic Eneloop 1900 mAh AA NiMH rechargeable battery. Advertised minimum and maximum modes are 1 and 350 lumens

Mode	Estimated Lumens	Estimated throw (FL1 meters)
1	-
2	1	5
3	12	18
4	37	31
5	92	49
6	227	77
7	403	102

Mode	Estimated lumens	Estimated throw (FL1 meters)
Mode 2	1	5
Mode 3	12	18
Mode 4	37	31
Mode 5	92	49
Mode 6	227	77
Mode 7	403	102

Mode	Estimated lumens	Time to 80%	Time to 50%	Time to 10%	Efficiency (lm/W)	Current (mA)
Mode 1	-			26.7 days	-	3
Mode 2	1			3.8 days	40	21
Mode 3	12			20.0 hours	104	96
Mode 4	37			6.7 hours	109	283
Mode 5	92	2.2 hours	2.2 hours	2.5 hours	97	760
Mode 6	227	47 minutes	48 minutes	79 minutes	80	2180
Mode 7	403	6.5 minutes	39 minutes	45 minutes	77	4700

14500 battery

Measurements were taken using a Sofirn 900 mAh 14500 Li-ion rechargeable battery. Advertised minimum and maximum modes are 1 and 900 lumens with 119m throw on maximum.

Mode	Estimated lumens	Estimated throw (FL1 meters)
Mode 2	5	11
Mode 3	28	27
Mode 4	84	47
Mode 5	211	74
Mode 6	473	111
Mode 7	947	157

Mode	Estimated lumens	Time to 80%	Time to 50%	Time to 10%	Efficiency (lm/W)	Current (mA)
Standby	-			1.8 years	-	0.05
Mode 1	-			1.1 months	-	1
Mode 2	5			2.6 days	104	13
Mode 3	28			10.8 hours	102	74
Mode 4	84			3.7 hours	105	216
Mode 5	211	25 minutes	113 minutes	2.9 hours	109	517
Mode 6	473	10.0 minutes	55 minutes	90 minutes	104	1150
Mode 7	947	4.0 minutes	8.9 minutes	44 minutes	107	2400

Output depends on battery voltage in all modes, and with the battery at 3.7V, the levels are (low), 3, 18, 55, 134, 286, 765.

Light quality

Readings are taken from the center spot diffused with DC Fix diffusion film using an X-rite i1Pro spectrophotometer.

Mode	Color Temperature	Tint Duv	CRI	CRI R9 (deep red)	CRI R12 (deep blue)
Mode 2	5150K	0.0073 (extremely green)	88.9	46.0	73.1
Mode 3	5186K	0.0079 (extremely green)	88.5	44.4	72.9
Mode 4	5332K	0.0079 (extremely green)	88.4	43.2	72.2
Mode 5	5322K	0.0075 (extremely green)	88.6	43.3	72.1
Mode 6	5359K	0.0066 (extremely green)	89.0	44.1	73.1
Mode 7	5337K	0.0055 (very green)	89.8	44.6	73.0

Beamshots

Outdoor beamshots are shown next to the Zebralight SC64c LE for reference only; a direct comparison between the two lights would be unfair.

14500 max vs Zebralight SC64c LE max

14500 sustainable vs Zebralight SC64c LE sustainable

AA max vs Zebralight SC64c LE max

AA sustainable vs Zebralight SC64c LE sustainable

Tint vs Zebralight SC64c LE

Tint vs BLF 348

Batteries and charging

Any button-top AA or 14500 cell can be used in the SP10 Pro, including longer protected cells. The high power requirements on AA mean that alkaline batteries will perform badly at settings much over 100 lumens, which is true for other AA flashlights as well.

Size and ergonomics

The SP10 Pro is a little larger than the more expensive Skilhunt M150, but still very unobtrusive for pocket carry. The pocket clip has very little ramp though, and does not insert easily into some pockets. The button is hard to find by feel, with little protection against accidental presses, and a spongy action.

Modification potential

The bezel is glued in place, but was not difficult to unscrew with strap wrenches, providing access to the reflector and LED. Most popular 3-volt LEDs could replace the original Samsung; a Nichia 519A would improve the flashlight. Flashing pads are provided to install firmware, and Anduril 2 is open source.