Why everyone needs this USB power meter I tested that's shockingly accurate (and it's cheap)

I never thought that a $12 accessory could rival tools that cost much more. But this USB-C power meter delivers in profound ways.
EDN

Handheld color meter

This handy battery-operated meter measures color and illuminance/luminance of light sources in the field or lab. The HCT-99-D measures color chromaticity coordinates x,y and u',v', lux, and candela ...