2 face kitchen????

In my kitchen there are 4 long eco-lux bulbs that produce 2200 lumens at 4100 K for color temp. Now you would think they would produce the same color but for some reason there not. I actually have two different moods to the kitchen if i keep one pair of the four on it produces a warm color and if you switch on the other pair only you get a cool color to the room. its a slight but noticelable difference on camera.