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Looking for RGB or RGBW values of a sunrise

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rs20:

--- Quote from: cdev on September 21, 2017, 01:32:38 am ---Don't LEDs also work in reverse, so to speak, with their maximum sensitivity being at the color they emit light at?

--- End quote ---

No, they will respond to colors at a higher energy/frequency than what they emit at -- i.e., photons with enough energy to promote electrons across the bandgap or whatever (if the LED epoxy is tinted red, though, that will obviously contribute). In any case, even if the sensitivity curve matched the emission curve perfectly, that's explicitly not what the OP wants -- the OP wants sensitivity curves that match the human eye, as creating an experience that matches a sunset (as seen by humans) is the aim of the game here.

BrianHG:
Use 2 RGB sensors.  1 for the sky and the other for you LED strip.  Match the color characteristics.  The RGB sensor has the built in analog with temperature correction to guarantee a fixed reference reading from device to device.  Also, a cheap pinhole lens may be used to capture the sky with a narrower field of view.

cdev:
Please let us know if you capture the legendary green flash. (a brief moment of green light that occurs at a specific moment during the sunrise and sunset as the light from the sun is emerging or vanishing.)

BrianHG:

--- Quote from: cdev on September 21, 2017, 04:52:12 am ---Please let us know if you capture the legendary green flash. (a brief moment of green light that occurs at a specific moment during the sunrise and sunset as the light from the sun is emerging or vanishing.)

--- End quote ---
Wicked.... I've never seen that before....

cdev:
Indeed,

Okay, now you need to see it.. how?

 you need to have a clear view towards the west or east. Very flat places are the best- or in an airplane. I think the reflection off the water magnifies it so you're most likely to see it at a beach alongside a large body of water.

Ridgetop hiking, at sunset, I think you may have a better chance although it seems to me the inversion/blob kind of green happens less from high up.

(to be honest with you I don't know the science, just trying to go from memory, sunsets from ridges while hiking=spectacular/colorful..)

If you don't live anywhere near a beach, but fly from time to time, perhaps your best chance of seeing one soon is from the air?

Quote from: BrianHG on Today at 03:29:20Quote from: cdev on Yesterday at 22:52:12
Please let us know if you capture the legendary
--- End quote ---
green flash. (a brief moment of green light that occurs at a specific moment during the sunrise and sunset as the light from the sun is emerging or vanishing.)

--- End quote ---
Wicked.... I've never seen that before....

--- End quote ---

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