You’ll see warm white lighting everywhere, it’s a popular choice as it seems to be the middle ground between bright, white lighting and cosy accent warm lighting. These types of bulbs emit a cosy feeling to a room, whilst offering a bit more clarity to the room. Their glow can be described as a white-ish yellow.
A great example of where this lighting is commonly used is in bars. Its ability to be bright enough so that you can see what you’re doing, whilst not being too harsh on the eyes is really quite desirable. Warm white could be used lighting in most places - somewhere to relax but also be a little bit more focused. Think, living rooms or dining rooms, even hallways.