Hello,
Firstly I would like to talk to you about COB lights. I personally think it is way better than panel lights because the more recessed the light source is; The more it is hidden to the Naked eye.

The same also features some architectural lighting benefits too Were you could choose the beam angle so that a specific Area Is highlighted.

Secondly your query about yellow, light yellow and white light Which are basically known as warm neutral and cool light. The truth is warm is the most preferred colour around the globe as it instantly makes A place feel Cosy and also brings out the richness in colours and also gives out a more relaxed feel to the eye.

But basically we have been mostly drawn to white tube lights in the past and our human nature have adjusted to it and prefers the same in simulated environment. There is also some basic science to this matter. As in western countries people live in Cooler climates. When they get back home at evening or at night the warm tone of light gives them a sense of warmth-ness, Similarly as our country is very close to the equator and has this summer tropical climate when we get back to our homes the Cooler tune of light gives us a sense of coolness.

Please do not worry but it is said that LED lights which are closer to the blue tone is considered a bit on the harmful side so I would suggest you to go for neutral or warm light or a mix of both.

P.S. I have personally used COB recessed lights for a whole residential project complemented with other layering of light such as hidden cover light and different lamp light sources.