The artificial onyx slab is manufactured to be translucent with lights, which can't be realized by some natural onyx stone. Without lights, it is also very beautiful or elegant with various color designs. Some designers prefer to match two same color design to install as TV wall slab or bigger background for luxurious hotels. With lights, it can be totally different experiences. Especially in some dark situation like bar, the artificial onyx with backside lights will be very exciting when you are enjoying noisy night life. Therefore, many stone dealers prefer this material to install with light. www.optstone.com