This is the highest power Alonefire UV flashlight listed on Amazon so far as I can find. It has six quad core UV LEDs and uses a included 26650 battery standard. The battery compartment is also long enough to accept a 26700 flat top cell. The included accessories include a 21700 adapter sleeve and a three AAA in series battery holder. I would not expect three AAA batteries in series to be capable of running the light at anything close to full power. I have installed a 21700 Molicel P45B to ensure adequate power as the included battery does not list maximum continuous current rating and the Molicel is rated for 30 amps continuous.
On Amazon it claims to be 60 watts power draw and 8000 mW UV output but the same light on some AliExpress listings claims 120 watts.
USB charging includes both USB A and USB C input ports and the USB C input port works with both A to C and C to C cables, not true of all Alonefire UV lights. The Amazon listing includes claims of the light being capable of acting as a power bank too.
User interface includes two output levels selectable with quick presses of the side switch as well as output ramping mode selected by holding down the switch. At output maximum and minimum while ramping the LEDs blink twice. The user interface is basically the same as the Alonefire SV43 but this light does not include the 4 LEDs to indicate battery charge level.
The front bezel unscrews to allow removal of the UV filter but there is no clear glass lens included to replace the filter so the reflector is not tightly retained with the filter removed. If you want to try the light without the filter it looks like a replacement clear glass lens of 40mm diameter should fit.
Overall a neat UV light that seems to be solidly built for the price and with versatile battery options. Included accessories are UV safety glasses, a charging cable and the noted battery option accessories. Alonefire included documentation is minimal and does not include operating instructions for their various lights user interfaces.
Note that if the Amazon listing is correct then 60 watts of battery draw only gives 8 watts of UV B light output, an efficiency of 13.3%. I presume that the rest is lost as heat or output at the red end of the spectrum and other light frequencies as shown in the graphs included in the 1Lumen UV flashlights review article. This may be a ballpark figure for actual UV B light output compared to UV flashlights power claims listings.
Below is a link to an article that includes information on on UV LED efficiencies. It looks like as the light frequency increases (shorter wave lengths) the efficiency of the LED decreases drastically.
I just looked up the SV116 on Amazon and it’s listed as a 365nm UV light and 365nm is UV-A, not UV-B.
And on the matter of the claimed 60 watt: I don’t know if you have a clamp meter that can measure DC current? Otherwise you can do a measurement at the tail, to see how many Amps the light draws. (A regular digital multimeter might not be very accurate, due to possible added resistance.)
Then also measure the voltage going to the LED’s and you can calculate how many watts in generates. Keep in mind that you don’t know the efficiency of the driver, so there could also be a small loss, but it will give you at least an idea if it’s in the ballpark of the claimed 60 watt.
Sorry for the error Wingman. I did not double check and see that both 365 and 395 nm fall within UV A specifications. As for the questioning, based on the ridiculous and outrageous claims I see in advertising listings on Amazon and eBay for many electronics items from the far east I tend to question claims from many less known manufacturers and sellers from there.
I am old enough to remember when Japan was so concerned about their exports quality reputation they had agencies to police their optical products that were exported. Thus the JCII stickers on exported cameras and the JTII stickers on other optical products they exported. As a result their products became world renown for their quality, the direct opposite of the current situation for many items exported from China.
It is a fair sized light at 10+ ounces and almost 6" long with the battery. Head diameter is 1.8" and the battery tube is 1.32" so not an item for a pants pocket.
