How would you like your vanity top or island to be a night light?
There are a number of natural stones that allow significant transmission of light even in 3CM material.
This attribute has been used for many years in very high end applications. Recent developments have made it somewhat more affordable.
Historically the backlighting was provided by neon, flourescent, or even incandescent lighting. The heat from the lights and the need for service access created considerable design and cost issues.
Today there are low voltage DC light sources typically LED's with a service life of 25,000+ hours. No heat issues. On some a dimmer can also be used.
THis is an extraordinarily beautiful way to use natural stone. It's often used for vanity tops but also for island or bar tops. We have also done full height backsplash with backlighting.
This takes considerable coordination between the fabricator, cabinet builder, GC, and electricians but it is something special.