"Lumi-sheet" is a multi layer material containing special fluorescent dyes dispersed in a binder with a high
Dielectric constant. When alternating current is applied, the sheet emits cold light.
An electro luminescent lamp is constructed in a manner to a capacitor - two conducting surfaces with a dielectric
In between. The luminescent material is commonly dispersed within the dielectric, which may be in any location in the
Path of the electrostatic field. Usually one electrode is translucent, but grids of various sorts have been used.