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Streamlight 51010 Twin-Task 3C 9-Inch UV Flashlight, Black

3.7 out of 5 stars 127 customer reviews

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  • Anodized machined aluminum alloy body; Enhanced Knurled grip
  • Lens is unbreakable polycarbonate with scratch resistant coat
  • 3.6-volt, 0.9-amp high-pressure Xenon, three 390 Nm and three 375 Nm ultra violet LEDs
  • O-ring sealed for water resistance
  • Measures nine inches
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Product Description

Product Description

Water resistant machined aluminum flashlight. Features abination of 3-375 AND 3-390 ultra-violet LED's and 1 focusable xenon bulb. Uses 3 C batteries not included. 9.00 in. long. Weighs .989 lbs. Lanyard included. Ideal for determining fraudulent documents where hidden ink is known to be used: driver's lecenses credit cards vehicle registrations etc.ATTRIBUTES Batteries Included: No Bulb: 3.6 Volt Xenon 390 Nm UV LED x 3 375 Nm UV LED x 3 Burn Time: 5 Hours Carry System: Lanyard Finish: Black Anodized Material: Aluminum Output (lumens): 57 Overall Length (inches): 9.00 Power Source: C x 3 Special Features: 3 Modes Submersible: No Switch: Push Button

The versatile Streamlight Twin-Task 3C UV flashlight includes an ultra-bright xenon bulb plus six ultraviolet LEDs for UV detection of fraudulent documents, forensic investigations, and for detecting engine and HVAC leaks. With both a traditional incandescent flashlight and an ultraviolet light, the Twin-Task 3C UV offers nearly seamless transition between UV detection and all-purpose flashlight applications.

Twin-Task 3C UV
Seamless transition between ultra-bright xenon flashlight and ultraviolet LEDs.
At a Glance
Streamlight Streamlight Twin-Task 3C UV
At a Glance:
  • Ultra-bright xenon bulb

  • Six ultraviolet LEDs for UV detection

  • Powered by 3 C-size batteries

  • Up to 160 hours of run time (on 6 LEDs)

  • Water resistant (IPX4 rating)

  • Scratch-resistant polycarbonate lens

  • Limited lifetime warranty
At a Glance

Powered by three C-size batteries (not included), you'll get up to 5 hours of run time when using the xenon bulb, up to 160 hours when using three LEDs, and up to 100 hours of use with the full complement of six LEDs. The xenon bulb has a light output of 57 lumens. This matte black model includes three 390-nm and three 375-nm ultraviolet LEDs.

Constructed from anodized machined aluminum alloy, the durable Twin-Task is both corrosion and water resistant (IPX4 rating). Other features include an O-ring seal, unbreakable polycarbonate lens, pushbutton head switch, enhanced knurled grip for easy handling, and adjustable focus when using the xenon bulb. It measures 9.02 inches long, and it has a 1.26-inch body diameter (1.68 inches at the head). This Twin-Task 3C weighs 1 pound when loaded with batteries.

Is Ultraviolet Light Safe?

The wavelength used in Streamlight's UV lights, known as long wave ultraviolet light, is completely safe under normal use. In extremely high amounts, however, it can be harmful when exposed directly to the eye or the skin.


This flashlight is warranted to be free of defect for a lifetime of use. Streamlight will repair, replace or refund the purchase price, at its option, of any Streamlight product that does not work or that you manage to break for as long as you own it. This limited lifetime warranty excludes abuse and batteries.

What's in the Box

Twin-Task 3C UV flashlight; lanyard; operating instructions

Product Information

Technical Details

Part Number 51010
Item Weight 1 pounds
Product Dimensions 1.7 x 1.7 x 9 inches
Item model number 51010
Color Black
Material Aluminum
Power Source Battery-Powered
Item Package Quantity 1
Type of Bulb Xenon/LED
Batteries Included? No
Batteries Required? Yes
Warranty Description Limited Lifetime Warranty
National Stock Number 6230-01-567-9017

Additional Information

Customer Reviews
3.7 out of 5 stars 127 customer reviews

3.7 out of 5 stars
Best Sellers Rank #222,831 in Home Improvements (See top 100)
#3,980 in Home Improvement > Hardware > Flashlights > Handheld Flashlights
#11,635 in Home Improvement > Contractor Supply
#35,437 in Home Improvement > Power & Hand Tools > Hand Tools
Shipping Weight 6.4 ounces
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available October 3, 2006

Warranty & Support

Warranty, Parts:Parts
Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By G. Foltz on November 13, 2007
Verified Purchase
Bought this for scorpion hunting. Almost got the cheaper version that didn't have the 375nm. I think I would've been very disappointed in saving that $10. The 375nm is the only one I use--it is MUCH brighter and useful than the other (390nm), both for carpet stains and scorpions. And having the bright white xenon option makes it very versatile when I encounter something I just want to light up. It's an awesome flashlight, well-made. I really needed it, so I don't regret spending the money, but I still think it's overpriced.
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Verified Purchase
I purchased the Streamlight Twin-Task 3C 9 Inch UV Flashlight, Black (#51010) about a month ago. I'd done a little research online regarding UV lights, especially portable LED Ultraviolet sources and decided, since this light had two UV frequencies of 375 and 390 Nm (the Streamlight Twin-Task 3C 9 Inch UV Flashlight, Titanium #51018, selling for about 1/3 less, uses 6 LEDs to provide just one frequency of 390 Nm), this light might be slightly more useful overall. Since I didn't buy both to compare, I can't...
But I can say that this flashlight is a good quality unit that equals other Streamlight products in quality. I've used a rechargeable Streamlight Xenon flashlight daily in my profession for the last ten years and for my money, so far, it can't be beat! And, this UV/visible spectrum flashlight is great: it puts out far more UV light than I expected to get out of a flashlight with six LEDs. The Xenon lamp puts out a very useful amount of visible spectrum light (to see what you're 'really' looking at. I'm pleased with my purchase, hope you are too!
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Verified Purchase
I'm quite versed with the world of flashlights. I frequent CandlePowerForums a lot, so I know a bunch about this type of stuff. With that said...

I bought this light because I wanted to have both long and short wave lengths of UV light, that way if one thing didn't light up with one wavelength, it was sure to light up with the other. Make sure you buy the Black one for this dual UV light feature.

The overall construction of this light is pretty solid and hefty. The weight of the 3 C batteries adds to the heft, but even without them, it's a beefy light with aggressive knurling. I'm pretty sure the anodizing is only type II, and NOT type III hard anodizing, which is a shame, but not a deal breaker.

Besides not having a HA-III coating, the only other thing I can complain about as far as the construction quality is the cheap plastic reflector.

I'm not sure if this light has regulated power output or not, but I seriously doubt it.

The incandescent bulb produces a decent amount of light, but the reflector and optics produce an ugly beam pattern with artifacts and asymmetries.

The UV lights are very neat and really do the job that UV light is intended for, but they aren't bright enough to get a wow factor in the day. Wait until night time and walk around your house with the house lights off... very cool to see everything.

So overall, I'm glad I have this light because of the neat things you can do with the dual wavelength UV light. I see the white incandescent bulb main light as just a bonus, icing on the cake type of thing. It just means that if I bring this light to somewhere to play with the UV, I won't have to also lug around a regular white light in case I need to see regular in the dark.

I wish it was smaller and used 1 or 2 CR123A batteries instead though.

Pretty good and neat light overall.
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Verified Purchase
I live near Tucson, Arizona and started noticing scorpions in my house over the past two years. After researching a few UV lights on Amazon, I decided to go with this Streamlight - in part because I own two Streamlight Stingers (and have given two others away as gifts) that have been rock solid for years. This flashlight hasn't disappointed me in regards to build quality. At first I wished that it was rechargeable like my others, but the first set of batteries are holding up very well so far.

After finding a few scorpions and then ordering this, it took three months before I found another one. No complaints, btw! :) I just didn't know if it actually worked until last night. Well, I can say that it sure does (I uploaded an image of a scorpion being illuminated by it). I actually didn't use it to find the scorpion (my dog found it), but I was able to try out the flashlight once I relocated it outside. Under regular lighting, the scorpion was nearly invisible against the background of brown rocks - but it was obvious to spot when the UV lights were on. The first set of LEDS (365 nm, I think) worked but were quite dim. With both sets of LEDs on, it was easy to see.

A note for those of you who, like me, walk around your house with the UV light as soon as you get it to see what invisible (and probably disgusting) stuff is around...white cotton lights up like a Christmas tree under UV light. Maybe everyone but me already knew that, but I was a bit shocked at first when I was looking around. I was curious to see if my carpet had been soiled by pet stains, and I was initially stunned by the amount of stuff on the carpet - until I realized that it was just lint from the new socks that I had been wearing around.
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