Just briefly tested one H600Fc Mk4 sample, thanks Kaybi.
Just like on most frosted ZL’s, output is quite far from specified (1124 lumens measured @30s vs. 1568 advertised). The tint is great with little difference between modes. Tint shift is a non issue thanks to the diffused lens. Efficacy is mediocre.
CRI and tint data measured from the hotspot on max mode (H1). Very nice tint (duv 0.0011) at 3983 K.
CRI data on M1. Slightly warmer and farther away from BBL but still great (duv 0.0021).
Total system efficacy over the runtime is 86 lm/W (retested the battery) 89 lm/W measured on the 410 lumen H2 mode. A clear improvement over the H600Fd Mk3 with an XM-L2 Easywhite which clocked in at 67 lm/W especially considering the CRI90+ emitter on the Mk4. Still far away from the H2R (135 lm/W).
