Does anyone else who uses the LIFX bulbs know the best setting for them to imitate a Mercury Vapor and a High-Pressure Sodium?

For simulate MV:
RGB: rgb(0, 255, 200)
HEX: #00ffc8
HSL: hsl(167, 100%, 50%)
HBW: hwb(167, 0%, 0%)
CMYK: cmyk(100%, 0%, 22%, 0%)
NCOL: G78, 0%, 0%

For simulate HPS:
RGB: rgb(255, 150, 0)
HEX: #ff9600
HSL: hsl(35, 100%, 50%)
HBW: hwb(35, 0%, 0%)
CMYK: cmyk(0%, 41%, 100%, 0%)
NCOL: R59, 0%, 0%

Mercury (even uncoated) does have tiny amount of Red, and SON does have some Blue. It is not much, but it is enough to get a hint of the color of a Red or Blue object respectively under either lamp. RGB LEDs won't give that if you set the color to really 0

But other than by getting a similar color, RGB LED lamp cannot replicate the accurate spectrum of a discharge lamp

Maybe setting the blue or the red to 10 or 24 will do the job. The color that I posted was just a fancy color simulation based on internet images, witout using the color picker. Doing it with a color picker will do a better result, because the MV peaks will trip the camera sensors in the correct red, green and blue amounts.

No, because there are 3 additional transformations over the color space that screw everything up 3 times over : The camera response (not same as eye), The camera Auto White Balance (with which 99% of pictures are taken), and the monitor on which the image is displayed

No, because there are 3 additional transformations over the color space that screw everything up 3 times over : The camera response (not same as eye), The camera Auto White Balance (with which 99% of pictures are taken), and the monitor on which the image is displayed

Yep, for example the blacklight trip the red sensors of the camera by some reason, while the blaclight doesn't emmite any kind of red light. You can "dissable" the white balance calibrating it with showing a white paper in front of your camera, so the picture will have the same color balance of the enviroment, and that should not affect the colors.