Under cupboard lighting is a great way of providing task lighting onto a kitchen work surface or basin in a bathroom.
Use linear LEDs such as the Contour range for a consistent glow across the length of the work surface. This can be used with a diffuser to prevent visible dots of the LEDs in reflective finishes.
Lighting can be incorporated behind a frosted glass splashback to create a light box effect which floods the work space with light. Colour changing RGB Contour can be added to provide coloured lighting when required. Alternatively a linear line of light concealed under the units can create a strong architectural effect.
As with all joinery lighting, the light source should not be visible. Think about whether lighting can be seen while sitting at the dining table or on the sofa.