I do know that it’s supposed to have a color temperature of 4100k according to the box the light came in. I’m figuring you are talking about what happens around 0:55 in the video where the light flashes to a white color from the blue green color.
The flashes of white light is the halide salts in the bulb arc tube entering the arc stream. The bulbs start out blue, because the mercury content in the arc tube vaporizes first, then as the halide salts start to vaporize, the color temperature of the arc tube stabilizes to the intended color temperature.
I randomly have an industrial sodium vapour light attached to my house in my backyard. It's the type that you would expect to see on the side of an older warehouse / factory yard pre-modern industrial LEDs. I believe that the original owner was an electrician and probably installed it himself, simply because he could. It's kinda cool.
