A round flashlight in a jeans pocket prints like a pipe. It snags the seat, reminds you it’s there every time you crouch, and that’s why these three exist. If the light is going to live next to a meter and a knife, the body has to disappear until you actually need it.
The Sofirn ST1 is the lumen pig for flashlight people — a gunmetal slab that can dump a claimed 1500-lumen turbo, then steps down. The Klein Tools 56074 is a pocket work light that happens to be flat: magnetic tail, dual-way hat clip, underside flood, and a Class 2 green laser. The Olight ArkPro Ultra is the $130 4-in-1 with flood, spot, 365 nm UV, and a laser in one slab. Pick the job first, then pick the light.
I haven’t run a three-week bake-off on all three. These are published FL1 and maker numbers, plus what they mean on a shift. Street prices are late August 2026. The Klein 56074 is already in the First 10 kit. Don’t mix this up with the Klein 56079 slim 360° work light already on this site — that’s a different SKU.
As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.
Quick Verdict: Klein 56074 Wins This Flat EDC Showdown
Three flat USB-C pocket lights. Klein takes the shift, Sofirn takes the spec sheet, and Olight takes the gadget drawer.
- They all sit flat in a jeans pocket instead of printing like a pipe
- Klein hangs on steel, clips to a hat, and gives you a Class 2 laser with runtimes you can actually plan around
- Sofirn dumps a claimed 1500-lumen turbo and 226 m of throw for about $25–40
- Olight puts flood, spot, UV, and a laser in one slab if you want the do-everything version
- All three batteries are sealed — when the cell dies, you’re buying a new light
- Those 1500 / 1700 / 1000 turbo numbers are bursts, not a mode you plan a job on
- Sofirn has no magnet, so it won’t hang on plant steel
- Olight’s laser (Class 1 or 3R, depending on SKU) is a longer talk with a safety guy than Klein’s Class 2
- Klein 56074: 1000 lm turbo (60 s), FL1 High 400 lm / 3 h, 77 g, IP55 / 2 m drop, magnetic tail
- Sofirn ST1: 1500 lm turbo then step-down, 226 m claimed, ~100–102 g, IPX7, no magnet
- Olight ArkPro Ultra: 1700 lm flood turbo (tables sometimes 1500), 800 lm spot / 205 m, ~115–120 g, IPX7
Best For: Work pocket is the Klein 56074. Glovebox, hiking, or throw on a budget is the Sofirn ST1. Flood, spot, UV, and a pointer in one slab is the Olight ArkPro Ultra.
The Klein 56074 wins this showdown — not because it dumps the most lumens, but because it’s the one that belongs in a work pocket.
Why these three, and how they actually compare
The table is the spec sheet. The rest of this is what those numbers buy you on a shift. Turbo lumens look great on a box, but Klein’s 1000-lumen turbo is a 60-second burst, and Sofirn’s 1500 does the same thing — it dumps, then it steps down. Plan the job on high, not the number on the carton.
The other split is features versus throw. Klein and Olight both hang on steel and clip on a hat or pocket. Sofirn does not — no magnet, and the clip is listing-dependent. If you’re pointing at a junction box or checking a leak with UV, you’re already in Klein or Olight territory. If you want a cheap glovebox thrower, Sofirn is the one that makes sense.
I haven’t had these three on a belt for a month side by side, so I’m not going to pretend I have lumen-meter logs. Street prices are late August 2026. And keep the SKUs straight: this is not the Klein 56079 slim 360° work light already on this site. That review is a pivoting-head work lamp. The 56074 is the pocket flashlight, and it’s already in the First 10 kit.
How It Stacks Up
| Feature | Sofirn ST1 | Klein Tools 56074 | Olight ArkPro Ultra |
|---|---|---|---|
| Street price (late Aug 2026) | ~$24–$40 | ~$57–$84 | $130 list, often on sale |
| Size / weight | 4.72×1.10×0.63 in, ~100–102 g | 4.31×1.05×0.56 in, 2.72 oz / 77 g | 4.88×1.06×0.63 in, ~115–120 g |
| High / turbo | 1500 lm turbo, then steps down | 1000 lm turbo 60 s; High 400 lm / 3 h; Med 200 / 5 h; Low 100 / 8 h; underside flood ~150 lm / ~12 h | 1700 lm flood turbo (marketing; some tables still show 1500); 800 lm spot |
| Throw | 226 m claimed | Not a 200 m thrower; work flood + laser | 800 lm spot / 205 m |
| Extras | Throw + flood LEDs in one head (not independent) | Class 2 green laser <1 mW; underside flood | 365 nm UV; green laser Class 1 and/or 3R |
| Battery | Built-in 2100 mAh sealed | ~1000 mAh sealed | 2000 mAh sealed |
| Charge | USB-C tail | USB-C ~3.5 h | USB-C and MCC magnetic |
| Magnet | None | Magnetic tail | Yes |
| Clip | Dual-way clip on newer version (verify listing) | Dual-way hat/pocket clip | Dual-way deep clip |
| Water / drop | IPX7 / ~1 m | IP55 / 6.5 ft (2 m) | IPX7 |
| Who it is for | Flashlight people, campers, glovebox, throw on a budget | Electricians, maintenance, work pocket | Inspection + pointer + UV + flood in one slab |
The Breakdown
Same pocket problem, three different answers. Here’s what the published numbers actually buy you on a shift.
Sofirn ST1
Sofirn ST1 — front, LED head, back, and USB-C tail.
The ST1 is a gunmetal slab with one SFT25R and four CSP emitters, a buck driver, and five modes. USB-C lives under a tail boot. It ships in lockout, so a double-click wakes it — fine if you live in flashlight forums, extra steps if you just grabbed it off a dashboard at 2 a.m.
It’s made for the glovebox, camping, and people who want throw without spending Olight money. It’s not made for plant magnet work, because there isn’t a magnet. The battery is a sealed 2100 mAh cell, glued in, and when that cell dies the light is done.
Turbo is a burst. 1Lumen measured about 1500 lumens, then it steps down, so plan the walk on the sustained output, not the number on the box. Throw and flood share one head — you don’t get independent beams. IPX7, about a meter of water, and a late-August 2026 street price around $24–$40. That’s the whole pitch: lumens per dollar.
- Best lumens per dollar of the three
- Claimed 226 m of throw — the reach of the group
- IPX7, so rain and a dunk aren’t a panic
- Street price still sits in the $25–40 range
- No magnet, so it won’t hang on a panel or a beam
- Battery is glued in — when it dies, you’re buying a new light
- Cool, mixed tint. Fine for walking, not great for reading wire colors
- The UI is built for flashlight people, not a tired millwright at 2 a.m.
Verdict: Best lumens per dollar of the three. Worst millwright features, and that’s the trade.
Klein Tools 56074
Klein Tools 56074 — front, LED and Class 2 laser, clip and underside flood, charge port, magnetic tail.
Don’t confuse this with the slim 360° work light already on this site. That review is the 56079, a pivoting-head work lamp. This is the 56074 pocket flashlight.
Klein built it for electricians and maintenance, not for 200-meter throw shots. You get a Class 2 green laser under 1 mW, an underside flood around 150 lumens for about 12 hours, a magnetic tail, and a dual-way hat and pocket clip. FL1 high is 400 lumens for 3 hours, medium 200 for 5, low 100 for 8. Turbo is 1000 lumens in 60-second bursts — useful, not a work mode.
It’s the lightest of the three at 2.72 oz / 77 g, with a sealed ~1000 mAh cell that takes about 3.5 hours on USB-C. IP55, 6.5 ft (2 m) drop, operating temp 32–104°F. Street is around $57–$84 against an $84 list. If this lives in a work pocket, this is the one — and it’s already in the First 10 kit.
- Magnet, hat clip, underside flood, and a Class 2 laser in one pocket light
- Real FL1 runtimes — 400 lumens for 3 hours on high
- Class 2 laser, which is the one that doesn’t start a fight with the safety guy
- Lightest of the three at 2.72 oz
- Rated for a 2 m drop, which is the kind of abuse a work pocket actually sees
- IP55, not IPX7 — rain is fine, a soak is not
- Turbo is 1000 lumens for a minute, then you’re back on high
- Sealed cell, and a full charge takes about 3.5 hours
- Street is around $60, list is $84 — more than Sofirn, less than Olight
Verdict: If this lives in a work pocket, this is the one. It’s already in the First 10 for a reason.
Olight ArkPro Ultra
Olight ArkPro Ultra — front, LED, clip, charge port, MCC mag base.
The ArkPro Ultra is a 4-in-1: flood, spot, 365 nm UV, and a green laser, with a rotary selector. That’s for people who want inspection, a pointer, UV, and flood in one slab. It’s not for sites with a laser policy. Klein is Class 2. Olight is Class 1 and/or 3R depending on SKU, and 3R is a different conversation with a safety guy.
You pay $130 list, often on sale, for a sealed 2000 mAh cell. Dual charge — USB-C and MCC magnetic — plus a magnet in the body and a dual-way deep clip. IPX7, harder alloy, heaviest of the three at about 115–120 g. Marketing flood turbo is 1700 lumens; some Olight tables still show 1500. Spot is 800 lumens / 205 m.
Flood turbo heats the slab, and 14-day moonlight is still just moonlight. That’s more UI than a tired millwright wants if you just need to see a breaker. If that’s all you need, you bought a Swiss Army knife to spread butter.
- Flood, spot, 365 nm UV, and a green laser in one body
- Charges off USB-C or Olight’s magnetic cable, whichever you have
- Magnet in the body and a dual-way deep clip that actually stays put
- IPX7 and a harder alloy than the usual 6061 slab
- About twice Klein’s street price, five times Sofirn
- Some SKUs are Class 3R, which is a different conversation with a safety guy
- Sealed battery at $130 — when the cell dies, that’s an expensive brick
- Heaviest of the three at about 115–120 g
- More buttons and modes than you want if you just need to see a breaker
Verdict: Gadget win of the group. If you just need to see a breaker, you bought a Swiss Army knife to spread butter.
The Final Verdict
Klein Tools 56074 wins this one. Sofirn takes the spec-sheet turbo and throw. Olight takes the gadget drawer. Klein takes the shift.
Work pocket goes to the Klein 56074. Glovebox, hiking, or throw on a budget is the Sofirn ST1. If you actually want flood, spot, UV, and a pointer in one slab, that’s the Olight ArkPro Ultra.
If you’re buying a first flat EDC for work, stop at Klein and put the extra $70 toward pliers that outlive these sealed batteries.
Frequently Asked Questions
Is this the same as the Klein slim work light on this site?
No. That review is the 56079 (360° pivoting head). This is the 56074 pocket flashlight.
Which one for a millwright or maintenance pocket?
Klein 56074. Magnet, hat clip, Class 2 laser, and FL1 high at 400 lumens for 3 hours. That’s the one that belongs next to a meter.
Why ignore the 1500 / 1700 turbo numbers?
Those are bursts, not work modes. Klein turbo is 60 seconds. Plan the job on FL1 high, not the number on the box.
Does the Sofirn ST1 have a clip?
The newer version is sold with a dual-way clip. Older units were lanyard only, so check the listing photos before you buy.
What laser class are these?
Klein is Class 2, under 1 mW. Olight is Class 1 and/or 3R depending on SKU, and 3R is a different conversation with a safety guy.
Can you replace the battery?
All three are sealed. When the cell dies, the light is done. That’s the flat-EDC tax.
Where to Buy
Klein Tools 56074
Check Price on AmazonSofirn ST1
Check Price on AmazonOlight ArkPro Ultra
Check Price on Amazon