For USB powered ambient light bedside humidifiers for living rooms, useful comparison points include placement, dimensions, power method, capacity, controls and the specific functions represented by the search.
Catalog options relevant to this combination include USB Projection Humidifier Night Light, USB Quiet Flame Effect Aroma Diffuser Humidifier, and USB Desktop Humidifier Night Light. Their exact specifications can differ, so use the individual listings for final product details.