Full Technical Test Data
DARKBEAM Mini 395nm
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
228
Output Retained — 10 Min
97%
Output Retained — 30 Min
86%
Continuous Operating Time
12+ hr
Power Curve
UV Irradiance at Distance
UV irradiance measurements are shown in µW/cm².
| Distance | UV Irradiance |
|---|---|
| 10 ft | 267 µW/cm² |
| 20 ft | 73 µW/cm² |
| 30 ft | 36 µW/cm² |
| 40 ft | 19 µW/cm² |
| 50 ft | 10 µW/cm² |
| 60 ft | 9 µW/cm² |
Amazon Product Record
Exact Amazon Listing Name
DARKBEAM Flashlight UV Black Light 395 NM, Mini but Powerful USB- C | LED Rechargeable Woods Lamp, Ultraviolet Flashlights for Pet Dog Urine, Stains Detection / Resin Curing / Fluorescent Agent
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
228374 mJ/cm² ÷ 1,000 = 228.374 J/cm²
UV Geek UV Energy Index = 228
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.