A lighting system for a real estate sign comprises an elongated illumination arm, a light source, an attachment housing, a power supply, and means for removably attaching the attachment housing to a real estate sign. The light source is connected to one end of the illumination arm, and the power supply is connected to another end. The lighting system may further have a switch to interrupt and reestablish the electrical communication between the power supply and the light source. In a version of the invention, the illumination arm is articulable and may be bent to direct light from the light source toward the sign.