Good question. I could not find that either and if I were still doing commercial lighting specification I would need that. Best guess would be 35 to 40 degrees but it is just that. It looks curiously the same as another brand that is advertised as 40 degrees.
I think they are a little on the golden side. Suits me. Depending on your dimmer, they dim low and out. If your dimmers are not from 3-4 years ago, most likely you will want to change your switch out. The bulbs dim according to what your existing dimmer switch is capable of and rated for. In other words, older dimmers may not dim the bulbs out and maybe even cause flickering. I changed my dimmers out for newer ones just because the ones I had did not dim as low as I wanted the bulbs to go. Now, they dim low as I want, or completely out. I don't need out but I do like low
Also keep in mind that this is DIMMABLE so you can set your dimmer to about the equivalent of 50watts. The actually wattage per bulb is 10 watts and the lumens, which is the actually amount of light a bulb produces is 750 lumens. That may be more light than you need or want but it is there if you need it to find that lost contact or whatever. The energy consumption goes down when using a dimmer so you would be using less than 10 watts per bulb. I have the 2700K (warm white) version of these and those tend to appear less bright to the eye. They can be easier on the eye in some/many situations.