Ask and ye shall receive 
, i believe it may be implementated in the BLF lantern: *BLF LT1 Lantern Project) (updated Nov,17,2020)
The following quotes are from the first post of that thread which is looooong:
“Compact design based from the BLF Thorfire Q8 mid-section and battery section, with great run times, output, and tint ramping, mode groups, built-in USB charging capability, and versatility.”
“The firmware will be developed specifically for lantern use by Toykeeper of BLF, and will have most of the same mode groups as the Q8 flashlight, but with added modes including Candle-mode, sunset-mode, & possibly a tint ramping mode, (which allows the driver to ramp/fade between 3000K LEDs to 4000K LEDs, which will require a third lead for the LED star to have two channels, (one channel for three 3000K 3535 type LEDs and three 4000K 3535 LEDs, possibly the new Samsung High CRI LH351D-3535 series of LED emitters.”