Illuminance Meter testing method?

[MRsDNF]

Another thread here if it hasn’t been brought up yet.

WTS: Calibration lights for DIY integrating spheres / lumen tubes - 67 € -

2020 October: No kits available at the moment [image] Update 22.1.2020: Current calibration set consists of two Convoy S2+ with XM-L2 (low CRI, cool white) and SST20 (high CRI, neutral white). Price for the kit is the same at 67 € including two lights. Update 14.3.2019: Interest list for a throwier calibration light (Convoy C8+) added. Only 1 piece measured and ready to go now. Update 20.12.2018: Interest list for an ultra high CRI Nichia Optisolis modded Jetbeam added After some interest f…