§ 151.091  TYPES OF ILLUMINATION.
   (A)   External or indirect illumination. A light source which is placed outside of or away from the sign in a manner to illuminate the sign.
   (B)   Internal or direct illumination. A light source which is enclosed within the sign and viewed through a translucent panel.
   (C)   Luminous tubing. Light source formed by glass tubes filled with gas.
   (D)   Light bulb. Light source consisting of incandescent light bulbs.
(Ord. 97-04, passed 12-19-1996)