That is because someone hasn't set up the camera properly. You may still get some glow, but set correctly can minimize it unless they look right into the camera.
If nighttime color is what you are looking for, stay away from 4k - especially one with a 1/2.8" sensor. It will be crap. An 8MP will need quadruple the light than a 2MP... the best combination is a 4MP on a 1/1.8" sensor. Or the 2MP on the 1/2.8" sensor. You are looking at a 8MP camera on a 1/2.8" sensor - a 2MP will kick it's butt all night long. And then you are looking at one with a 2.8mm lens - if those people are not within 10 feet of the camera, you will not be able to ID a stranger...
ALL cameras need light at night. Simple physics. Marketing a camera as low light and full color doesn't change that fact. As some folks are finding out, some of these cameras play with parameters that make them look nice and bright at night, but when there is motion, it is a complete blur and ghosting. I can make a crap camera look like noon at midnight by adjusting the parameters and make it look great as a still picture, but as soon as motion is introduced, it is blur and ghost city. How many perps will stop for 5 seconds so that your camera can get a clean shot of them...
If there isn't enough light, then you want to get a camera that has infrared, but then it will be B/W. Once you take it off auto settings, you can then dial down the glow eyes quite a bit.
You would be surprised how much light these cameras need to stay in color at night (for the cameras that can switch to B/W with IR).
I have 33,000 lumen radiating off my house and I have to force the camera in color as it is not enough light for the camera to automatically stay in color at night. The sensors are small in cameras and need a lot of light.
I have enough light at this location that the white light on the camera didn’t make a difference. This is a 4MP camera on the 1/2.8" sensor with an LED white light as part of the camera. So with this 1/120 shutter speed, I wanted to see if the camera could perform with only the white light from the camera and the flood lights turned off. As you can see from this video, it never recognized me at these settings. You would need to run 1/80 shutter with just the white light to be able to start to make a person out, but the image is way too dark.
The average Joe will not spend the time to calibrate and will just leave the settings on auto and love the great still image they get and then just accept a blur/ghost motion at night. When do we need these to perform - at night!
Keep in mind that with the shutter at auto, it is a nice bright image, but motion was a blur...once you dial the camera in to actually be usable, you see the limitations...