... light or sunshine for 15-30 mins. Ten-years of useful time guarantee.Our Luminescent Surface is energy-conserving and ... safe, non-toxic and free from radiations: It's made of the third Luminescent materials, safe us and production.Our Luminescent ... , bar, decoration panel and ceiling, sideway of corridor, signboard, house number, billboard ect. Luminescent Solid Surface Stone--Artificial Stone Usage 3