I have several recessed LED lamps that I'd like to assess for color temperature so I can purchase replacements. The lights are advertised as having a "color temperature" of 2700K and 3000K among others (example [here](https://rads.stackoverflow.com/amzn/click/com/B076HYLZRV)). Is there a way to detect the color temperature from a photo or the lamp, perhaps by taking a photo side-by-side with a grey card?