BVH wrote:
Picked up a new toy……………indispensable measuring tool today. I’ve been what I call a connoisseur of light for a decade or so now. My sweet spot is 5500K. I’ve just not been able to get into the neutral or warm Whites.
There is only 1 incan bulb in my house. Everything else is LED 5000K or 5500K. Now I can precisely measure all of my home, car, searchlight and other lights’ color temps and the REAL CRI, not just the averaged number usually quoted for marketing purposes.
I’ve learned quite a bit over the last week while researching my purchase. The typical CRI number we see is the calculated average of 8 colors chosen decades ago by a Body in France, the name escapes me now. It represents how close a light source comes to the spectrum emitted by Tungsten incandescent light. CRI of Tungsten light is 100 on the CRI Scale.
Extended CRI adds another 7 colors to the mix and the Sekonic 7000 meter has the capability to measure and display the additional 7 additional colors. The more color samples that are taken, the more accurate your CRI is going to be.
But even CRI is a bit outdated and there have been and are processes in-motion to use another standard or two. There’s a lot more to it but i won’t get that deep.
Suffice to say that below, the first 2 pics are of readings of the Sun.
The first shows the Color temp in Kelvin (Tcp on the meter) of the Sun at 3:15 PM. Don’t pay attention to any of the lux reading as I did not set up for a precise Lux measurement.
The next pic shows the CRI RA average calculated on only the first 8 colors in the bar graph but it also shows specific individual CRI readings from all 15 samples. The higher the bar graph and number to the left, the higher the CRI of each of the sample colors and the closer to the Tungsten standard the measured light source is.
The 3rd and 4th pics are of the same type of measurements of the GT on HIGH, not Turbo.
The 5th and 6th pics are of the GT on Turbo. Notice how the R9 Red is absent from the GT and is actually a minus number.
Sol at 3:15 PM Dec 12 Text Mode
Sol at 3:15 PM Dec 12 Bar Graph Mode
GT at Top of Ramp Text Mode
GT at Top of Ramp Bar Graph
GT at Turbo Text Mode
GT at Turbo Bar Graph Mode
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End of BVH post
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Wow BVH!!! . :+1:
This is beyond neat… thanks for sharing!
Seems we have the same tint preference. Mine is about 5000K - 5700K.
But while I have to go with the advertised ‘data’…. you can actually measure it!
I am impressed!!
Thank you again for sharing!!