> I do not fully understand how CRI and tint can be independent of each other
tint, CRI, and Color Temperature are each separate criteria. It is a broad topic, here are some cliff notes:
CRI= Color Rendering Index
tint= in maukka’s tint charts below, Yellow and Green Tint are above the black line
CCT= Color Temperature = how warm or cool the light is. Incandescent bulbs produce light at around 3000 degrees Kelvin (CCT). Noon Sun is about 5500K. A candle is around 2000 Kelvin
maukka has some of the most informative images regarding tint, cri and color temperature
Look at his post about the Astrolux A01
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Lets compare to his measurements of the Astrolux S1 aka BLF A6
The BLF A6 has a Color temperature of 4630 and a CRI (Ra) of 71
The Astrolux A01 has a Color temperature of 3960 and a CRI (Ra) of 90
The tint of the A01 is less green, and closer to the BBL than the tint of the A6
The A01 has higher CRI, more red output, than the A6
for a simple way to compare CRI, shine each light at the palm of your hand. The Higher CRI light will show more pink tones, the lower CRI will tend to look less pink and less alive.
When I compare CRI I use a Red object. A high CRI beam will show more red. A low CRI beam will make the red look more brownish, less red.
some hand comparisons for different LEDs with different CRI values
