Commercial Fluorescent Lighting Why Do Commercial Kitchens Have Those Blue Flourescent Lights On The Walls?

Why do commercial kitchens have those blue flourescent lights on the walls? - commercial fluorescent lighting

I worked in various kitchens in restaurants and hotels, and they all blue neon lights on the walls. Of course, not for the light and the whole time that someone knows what they are? The attraction of insects, perhaps? Something completely different?