Is it ineffective in dark places?

Because nanoeZONE COAT is applied without using binders (adhesives), titanium dioxide particles are not buried or covered by binders. This leaves the surface of the titanium dioxide particles fully exposed, maintaining a large surface area that acts as a photocatalyst. As a result, sufficient effectiveness can be expected even under weak indoor lighting. However, it cannot exhibit photocatalytic effects in places with absolute darkness (zero light).