A recent job made me wonder ...

First, I do have a use for a light meter, to measure overall lighting levels. No problem there; sources are many.

However ... is there any reasonably portable, and affordable, way to measure the color temperature of the existing lights?

I ask this, having just gone through a great deal of frustration on a job ... apart from the issue of removing a bulb for examination, it seems that many bulbs are not identified as to their color temp - making matching a challenge.