Depending on how dark your bathroom wall tiles are, you will need stronger or weaker lamps for general illumination. With wall and ceiling lights, pay close attention to the formation of shadows. Adding indirect lighting using spotlights creates a more pleasant atmosphere.
Particularly important is the lighting of the bathroom mirror. The light should be glare-free, shadow-free, and most of all, even. Invest in special mirror lights and appropriately locate the wall lights.
(Source: Office Snapshots)
(Source: Solus Ceramics)
(Source: Light In the Bathroom)