1, the lamp quantity, type, light output, color, and light the lamp box position.

2, light-emitting logos material: acrylic sheet transmittance, reflectance, absorption, and the diffusion factor.

3, light box size, reflection factor especially Lightbox thickness and used in a box inside the coating or other towel attached materials.

4, the optical absorption box inside the tubes and electrical device of light-emitting logos brightness.

5, the maintenance: the light output intensity will decrease with increasing age and internal accumulation of dust box.