Why do you have to place a hotel key card in a wall slot to

Why do you have to place a hotel key card in a wall slot to wall slot lighting ELP's LED PerimeterSlot lighting products can be installed either surface or in a hidden slot to provide a grazing light down the walls and into the space wallpaper olympus slot WallSlot 8400 is a perimeter lighting fixture that effectively lights the upper wall at the ceiling line Shielding is flexible, with choice of lens and

wallet with airtag slot A continuos recessed lighting fixture that transitions from ceiling to wall The ceiling portion uniformly connects to VersaLux 2 or 4 slots while the wall