In addition to the blue light much dangerous for night sleep It’s looking direct the Led die.
This happens when there isn’t adequate diffusion such as a piece of white plastic.
Like the Led Corn bulbs,the orrible greenish street lamps or the ice cold car lights pointed on face.
Another important rule, avoid watch phone or others white display light in evening
The conventional PC Leds with the same amount blue light of incandescent are <2000k
However I liked dimming incandescent on my bedroom,easy and cheap.