Smart bathroom lights should be damp- or wet-rated. Damp-rating means lights are protected in moist locations, but not from direct exposure to water. Wet-rating refers to lights that are protected from dripping water, rain, or liquid splashes or flow in the outdoors or indoors.   IP rating represents the sealing effectiveness of your product and how it is protected from water. For example, IP44 offers water-resistance while IP65 offers waterproofness.