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The spectrum difference indicates that the cold bulb has been changed out for an LED model. The others most likely will be changed out as well as they fail.
LEDs can be warm. Someone just selected a mismatched bulb.
Not compared to other bulbs.
A simple web search finds a bunch of screw-in bulbs using LED sources in 1800K, which is similar to an incandescent bulb on a dimmer at a low setting, or a candle. A typical incandescent at full brightness is 2700K. Daytime sunlight is 5000-5700K.
i can all but guarantee these kinds of fixtures have never used incandescent bulbs and are not even designed to handle the heat from them.
You are correct. The yellow bulbs are most likely sodium bulbs. You would not use an incandescent bulb in that fixture.
I doubt they're sodium bulbs either, these are really modern fixtures and i see no reason for them to use anything other than LEDs, quite possibly not even in the form of standard bulbs.
Those are at least ten years old. And these do not contain standard house hold bulbs.
https://lemmy.world/comment/3558434
Thou art incorrect
All of them are pretty new LEDs. It’s built in 2021