We recommend the UltraFire C15S for hunters who want a light built specifically for blood tracking. Price $46.99. The partner record does not list eligibility for this product. Best for hunters who want a filtered UV light for following a blood trail after the shot.
A dedicated light for the blood trail.
We recommend the UltraFire C15S for hunters who want a light built specifically for blood tracking. The 365nm source sits behind a ZWB2 filter, which cuts the visible purple glow that cheaper 395nm lights throw across the ground, so blood reads as dark, high-contrast drops instead of disappearing into a violet wash. The kit is complete out of the box with a 2,600mAh 18650 battery and a USB-C cable, and UltraFire backs its flashlights with a three-year warranty. Treat it as a specialist tool: UltraFire does not publish a runtime or a white-light mode, so keep a headlamp for walking in and out.
What we like
- Filtered 365nm makes blood easier to read
- A deep head built to scan ahead
- Ready to track out of the box
Keep in mind
- One job, one beam
- No published runtime or rating
- UV light needs care
The details that matter.
Manufacturer specifications for the configuration reviewed.
- UV source
- 365nm with ZWB2 visible-light filter
- Beam power
- 16W (manufacturer stated)
- Battery
- 18650 Li-ion, 2,600mAh, 3.7V (included)
- Charging
- USB-C; cable included
- Length
- 152mm (5.98 in)
- Head / tail diameter
- 44.5mm (1.75 in) / 25mm (0.98 in)
- Weight
- 197g (6.95oz) with battery
- Bezel
- Steel-ball strike bezel
- Warranty
- 3 years on the flashlight; 1 year on batteries and accessories
- Model / SKU
- C15S 365nm UV / 9625SB
Who should buy the C15S?
Bowhunters and rifle hunters who regularly recover deer or hogs at dusk get the most from a dedicated tracking light. If you have ever lost a trail in leaf litter because white light turned every drop brown-on-brown, the C15S is the tool built to fix that. Casual campers looking for a do-everything flashlight should look at the UltraFire UF3 PRO or EX3 instead.
Why 365nm with a filter beats a cheap UV light
A 395nm light looks purple because a good share of its output is visible violet light. That glow reflects off everything and flattens contrast. A 365nm source sits further into the ultraviolet, and the ZWB2 filter blocks most of the visible light that leaks through, so the beam lights up the ground evenly while blood absorbs it and reads dark. UltraFire rates the beam at 16W.
Carrying it on a recovery
At 152mm long and 197g with its battery, the C15S is a full-size handheld rather than a pocket light. It slips into a pack side pocket or a jacket pocket for the walk in. A practical recovery kit is the C15S, a headlamp for hands-free movement, flagging tape for each drop, and a small power bank.
Charging and battery
The included 18650 cell is 2,600mAh at 3.7V and charges over USB-C from a wall plug, power bank, car charger, or laptop port. Because UltraFire does not publish a runtime, charge it fully before the hunt rather than relying on a partly used cell.
Using the UltraFire code
Our UltraFire reader code takes a percentage off at checkout on the official store, and UltraFire says orders ship free worldwide with tracking. Add the C15S, paste the code, and check the total before you pay.
Why we like it.
Filtered 365nm makes blood easier to read
Most cheap UV lights run at 395nm and spill visible purple light that washes out the ground. The C15S pairs a 365nm source with a ZWB2 filter, the setup tracking lights use to keep the beam clean so blood stands out as dark drops against leaves and grass.
A deep head built to scan ahead
The 44.5mm head and deep reflector throw the beam out in front of you, so you can sweep the trail from a step or two back instead of crouching over every leaf. That keeps you from trampling the sign you are trying to follow.
Ready to track out of the box
UltraFire includes the 2,600mAh 18650 battery and a USB-C cable, so you can charge it from a truck power bank the night before. The three-year flashlight warranty is generous for a light at this price.
A few things to consider.
One job, one beam
There is no white-light mode. You will still want a headlamp or a general flashlight for walking to the shot site and for camp chores.
No published runtime or rating
UltraFire does not list runtime, output in lumens, or a water-resistance rating for the C15S. Top it off before you head out and carry a backup light on long recoveries.
UV light needs care
Do not shine 365nm UV toward eyes, and keep it away from children. Tracking results vary with blood age, surface, and ambient light, so mark each drop as you go.
Get the C15S 365nm UV Blood Tracking Light.
Hunters who want a filtered UV light for following a blood trail after the shot. Check the current price and configuration with UltraFire.
Your UltraFire reader offer.
The partner record lists this code benefit but does not specify this product’s eligibility or stacking with store promotions.
See the UltraFire code, terms & redemption stepsA few good questions.
What is the discount code for the UltraFire C15S 365nm UV?
The UltraFire discount code is SEBASTIANBASSOL for 8% off at ultrafire.com. The partner record does not list eligibility for this product, so no after-code amount is estimated.
Does the UltraFire C15S work for blood tracking?
That is what it is built for. The 365nm source and ZWB2 filter reduce the visible purple glow of ordinary UV lights, so blood shows up as dark, high-contrast drops on leaves, grass, and soil.
What is the difference between 365nm and 395nm UV for tracking?
395nm lights emit a lot of visible violet light that washes out the ground. 365nm with a ZWB2 filter keeps the beam cleaner, which is why tracking hunters prefer it.
What battery does the C15S use?
It ships with an 18650 lithium-ion battery rated at 2,600mAh and 3.7V, and it charges over USB-C with the included cable.
How long does the C15S run?
UltraFire does not publish a runtime for the C15S. Charge it fully before a hunt and carry a backup light for long recoveries.
About this review
UltraFire official C15S product page, package list, dimension sheet, and warranty FAQ, with our editorial assessment. Product details checked October 17, 2026 against UltraFire's official product listing. Shop the official UltraFire store. Images courtesy of the manufacturer. Our editorial standards.
