Full Technical Test Data
ALONEFIRE SV43 365nm
Full published measurement and product information from our UV flashlight testing record.
Continuous Output Results
Published output, retention, and runtime values from the continuous-output test record.
UV Geek UV Energy Index
105
Output Retained — 10 Min
45%
Output Retained — 30 Min
38%
Continuous Operating Time
2 hr 47 min
Power Curve
UV Irradiance at Distance
UV irradiance measurements are shown in µW/cm².
| Distance | UV Irradiance |
|---|---|
| 10 ft | 73 µW/cm² |
| 20 ft | 25 µW/cm² |
| 30 ft | 11 µW/cm² |
| 40 ft | 6 µW/cm² |
| 50 ft | 2 µW/cm² |
| 60 ft | 0 µW/cm² |
Amazon Product Record
Exact Amazon Listing Name
ALONEFIRE SV43 36W 365nm UV Flashlight USB C Rechargeable Ultraviolet Black Light Woods Lamp for Pet Urine Detector, Resin Curing, Scorpion, Fishing, Leak with UV Protective Glasses, Battery
How UV Geek UV Energy Index Is Calculated
During the continuous-output test, the Linshang LS128 measures cumulative UV energy density. The instrument reports accumulated energy in millijoules per square centimeter (mJ/cm²).
Dividing by 1,000 converts the cumulative energy density from mJ/cm² to J/cm². The resulting numerical value is rounded to the nearest whole number and reported as the UV Geek UV Energy Index.
Calculation for this tested flashlight
105114 mJ/cm² ÷ 1,000 = 105.114 J/cm²
UV Geek UV Energy Index = 105
The UV Geek UV Energy Index is a derived comparison metric, not an industry-standard unit of measurement. It should not be confused with instantaneous UV irradiance measurements such as µW/cm².
Testing was conducted by UV Geek using consistent, documented procedures and factory-calibrated measurement equipment. Published results and derived metrics reflect the specific units tested, the recorded measurements, and UV Geek’s interpretation of those data.