The Quest for Good Color - 4. The Diffraction Grating Shootout

[Claes]

@ggbutcher Remember these charts?

Spectral emissions from modern light sources (more graphs added)

The last few days I have had problems with a “studio shot” (please read a desktop arrangement); a minute blue flower became far too red/violet when shot. I began to suspect the studio light (please read desktop lamp) and started to investigate what spectra our modern light bulbs/tubes really emit. Using @gwgill’s illumread and a ColorMunki Photo, I produced graphs for every kind of light source that was available in our house. Please note that the y-axis differ, depending on the “wattage” of th…

And do not forget the CRI:

Spectral emissions from modern light sources (more graphs added)

Do a web search for High CRI. In ordinary stores, you will probably find LEDs with Ra = 90. Look for “filament” LEDs. The last two types I have measured have an Ra of 92.4 (the R9 value is just 67.2, though, but still), TLCI = 89.8 (not bad!) and CCT=2727K. Great fun! They look like this: [9615531704350]

Have fun!
Claes in Lund, Sweden