Four light sources for duty, on a clip that weighs 25 grams.
White to work by, 365nm UV for inspection and authentication, and a red and blue warning strobe, all on a keychain unit that clips to a cap or pocket.
- 45 lumens of white light across three levels for general duty work
- 365nm / 500mW ultraviolet for documents, fluids and fluorescence checks
- Red and blue police warning strobe that runs for over 48 hours
- Head tilts over 120° and the oversized clip frees both hands
- Built-in battery, recharges over USB-C, no cells to carry or swap
- 25g and 74mm, rides on a keyring or in a shirt pocket
- IP65 dust and water resistant, 1m impact resistant
One unit instead of three tools on your belt.
White light handles the everyday: 45 lumens to check an ID, a vehicle interior or a dark doorway, across three levels down to a long-running low. The head tilts more than 120° so a clipped light drops onto your hands or your notebook.
Alongside it sit a 365nm UV source for inspection work and a red and blue strobe for warning and presence. You reach each one from a two-button layout instead of carrying a separate light, a UV pen and a marker.
365nm ultraviolet for inspection and authentication.
The 500mW UV source lights up the security features on banknotes, passports and documents, so you confirm what is genuine on the spot. It also brings out body fluids, stains and residues that white light walks straight past, which makes it useful for sanitary checks and scene work.
The same fluorescence reveals leaks in lubricants, coolant and hydraulic systems, and traces water and sewage piping. Outdoors it picks out scorpions and helps spot animal blood on a track.
Red and blue warning light that lasts a full shift and more.
The red and blue strobe marks your position and signals presence, running for over 48 hours on a charge, so it stays ready across long shifts without a thought for the battery. A steady red mode doubles as a night-vision-friendly reading and marker light.
The oversized steel clip holds the unit to a cap, a collar, a vest or a pocket, keeping the light pointed where you need it while both hands stay on the task.
Recharges over USB, rides anywhere.
The Li-ion battery is built in and tops up through the USB-C port, so there are no cells to source mid-shift and nothing to swap. The white light runs around two hours, the UV around two hours, and the warning strobe past 48 hours between charges.
At 25 grams in a polycarbonate body rated IP65 and to a 1-metre drop, it lives on a keyring, in a glovebox or a kit bag and shrugs off dust, rain and knocks.
WHY THE THUMB LEO OVER SEPARATE TOOLS
Four sources, one unit
White, UV, red and blue in a single keychain light, instead of a torch, a UV pen and a warning marker carried separately.
Inspection-grade UV
365nm at 500mW authenticates documents and reveals fluids and leaks by fluorescence, where a white light shows nothing.
Hands-free on duty
The 120° tilt and oversized clip hold the light on a cap or vest, keeping both hands free for the task.
Always charged, always on you
A built-in USB battery and a 48-hour warning runtime mean it lives on your keys and stays ready across shifts.
WHO CARRIES THE THUMB LEO
Patrol & Duty
White for checks and vehicle stops, a red and blue strobe for presence, all hands-free on a cap or vest.
Forensics & Inspection
365nm UV authenticates documents and currency and brings out fluids and residues for scene and sanitary checks.
Trades & Maintenance
UV fluorescence traces lubricant, coolant and hydraulic leaks and maps water and sewage piping.
Outdoors
UV picks out scorpions and animal blood on a track, while white and red cover camp and navigation.
OUTPUT & RUNTIME
| White | 45 lm · 2 h · 24 m · 150 cd |
| Ultraviolet | 365nm / 500mW · 2 h |
| Warning signals | Red + blue strobe · over 48 h |
| Red light | Steady (night-vision friendly) |
*White light, three levels
The 45-lumen white runs across three brightness levels down to a long-running low. Figures are ANSI/FL1 rated and vary with use.SPECIFICATIONS
| Light Sources | White, 365nm UV, red, blue |
| Max White Output | 45 lumens |
| UV Wavelength / Power | 365 nm / 500 mW |
| Max Beam Distance | 24 m |
| Peak Beam Intensity | 150 cd |
| Adjustable Head | Over 120° |
| Battery | Built-in Li-ion (rechargeable) |
| Charging | USB-C |
| Material | Polycarbonate |
| Impact Resistance | 1 m |
| Waterproof | IP65 (dust & water resistant) |
| Dimensions | 74 × 24 × 15.8 mm |
| Weight | 25 g (with battery and clip) |
| Manual | Download PDF |
FREQUENTLY ASKED QUESTIONS
What is the UV light for?
The 365nm UV checks the security marks on banknotes, passports and documents, and makes body fluids, stains and residues fluoresce for sanitary and scene checks. It also traces fluid leaks and piping, and outdoors it reveals scorpions and animal blood.
How long does the red and blue warning strobe last?
Over 48 hours on a full charge, since the warning signal draws very little power compared with the white light. The white runs around two hours and the UV around two hours.
Does it use replaceable batteries, and is a cable included?
The Li-ion battery is built in and recharges over USB-C, so there is nothing to swap. A cable is not included, since most people already have a USB-C cable and any standard one will charge it.
What's In The Box
- 1× Nitecore Thumb LEO - white / 365nm UV / red / blue keychain light with built-in battery
- 1× Key Ring
White, UV and a warning strobe, on your keys.
GET YOUR THUMB LEO NOWYou’re Backed by Our 60-Day Ironclad Guarantee
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Try it for 60 days. If it’s not right for you, send it back.
We stand behind our gear. If you’re not happy with your purchase, just return the full package within 60 days and we’ll issue a full refund—no fuss, no forms, no hoops to jump through.
What Happens After You Order
- You’ll get an instant order confirmation email with your receipt.
- We’ll pack your order the next working day and send you a tracking number once it’s on the way.
- From the moment you order to the moment it reaches your hands, we’re here to keep you updated and supported.
When will I receive my gear?
- Singapore: Delivered to your doorstep in 4–6 working days.
- International: Arrive within 10–14 working days.
Returns and warranty
- Every product comes with a 1 to 3-year replacement warranty (depending on the item).
- If anything isn’t working right, just let us know. We’ll make it right.
FREE Gift with Purchase: Limited Edition Ember Shard Whistle
Spend $99 or more today, and we'll automatically include a limited-edition Glow-in-the-Dark Ember Shard Whistle when packing your order.
Charge it quickly under sunlight or your flashlight, and enjoy its subtle glow throughout the night—perfect for marking gear, emergency kits, or attaching to your bag.
Limited quantities. These will be swapped (at our discretion) to other gift items if shards are unavailable.
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