Spectral Comparison
mercury vapor and daylight spectra

High-Pressure Mercury Vapor Light versus JMW Daylight
High-Pressure Mercury Vapor Light versus JMW Daylight
3 chains end at the same point. Call them 'triplets.'
The triplets are Mercury Vapor Light, matching JMW daylight, and a 'tristimulus' chain achromatic+red-green+blue.
The smoothly arcing chain is daylight.
The chain of short and long arrows is the mercury light. Narrow bands give the long arrows.
The large spheres are the blackbody locus at a fixed radius from the origin.
Starting with the reddest, the temperatures are: [2000, 3000, 4000, 5000, 7000, 1e+004, 2e+004, 1e+005]