The WaveGo from Wave Illumination offers simple yet accurate measurement for the characterisation of light sources. Paired with a smartphone app, the handheld device measures absolute irradiance, lux, colour temperature, colour rendering, TM30, Melanopic lux and PAR. WaveGo’s compact size and connected data management make it suitable for lighting manufacturers to test and prove quality in the plant and on field sales calls. The WaveGo uses a miniature spectrometer with 3.0 nm optical resolution to deliver light measurement over the 350–800 nm wavelength range, from 1 lux to 1,000,000 lux. The smartphone app captures single and continuous measurements with one touch. Users can select any combination of absolute irradiance spectrum, lux, CIE 1931 colour, CRI (Ra, R1-15), TM30 (Rf & Rg) and PAR for each measurement taken.