Abstract: An edge lighted display sign is disclosed which provides a base portion, defining a housing for a light source and a variable duty cycle oscillator including an exteriorly disposed ratio control device whereby the light source may be controlled from an "off" position, through an "on" "off" blinking range, from a very slow to a very rapid blinking, to a completely "on" position. A longitudinally extending slot is provided along the top length of the base to receive a lower end length of a transparent panel, formed of a clear or translucent glass or a suitable plastic material, whereby the lower edge portion of the glass panel is directly exposed to the light source. In a preferred form, the light source comprises a fluorescent light tube, and a removable bottom panel is provided for the housing to permit access to the light source and the cycle oscillator. A back side of the transparent panel is provided with an opaque coating or covering. Alternatively, the back side may be frosted.