On a sterilization or NDT line, an unverified UVC lamp is just a wild card. Kill-rate claims and surface disinfection promises don’t mean much unless you can put a number on the delivered dose. If you want performance you can trust, you have to measure the radiation intensity as it’s happening. What actually matters under the hood A verification-grade UVC system needs stable output at 254 nm and an irradiance profile that repeats across the target. We build the lamp and reflector to hold peak irradiance steady, so the delivered energy density (mJ/cm²) can be calculated and logged. The whole setup is meant for continuous duty: keep the arc positioned, keep the temperature rise controlled, and you avoid the output drift that messes up repeatability. In real terms, the same setpoint should give you the same dose, hour after hour. On the floor, disinfection isn’t a concept. It’s cycle time, pass rate, and compliance paperwork. Real-time intensity monitoring pulls the guesswork out. Set conveyor speed and lamp power to hit a validated dose, then capture the irradiance data for every batch. That’s what makes validation repeatable, cuts rework from under-dosing, and stops you from wasting energy on over-exposure. You end up with performance that’s documented and auditable. A few shop-floor details that make the readings honest. Intensity monitoring only works when the sensor sits in the right measurement plane and is calibrated for the UVC wavelength you’re running. Reflections off nearby surfaces and lamp warm-up time can throw numbers off if you don’t account for them. Make sure the sensor is compatible with your enclosure and power supply, and plan on periodic recalibration to keep traceability intact.