The invention is an indicator lamp for warning signal to a person who approaches the vehicle to steal a vehicle. A resin layer is bonded between ribs, of an innermost face. The body member includes a support member and extension member that can be folded outwardly from the back wall of the electrical box to contact an opposing wall and support the electrical box. The wall sections are disposed radially inwardly from the peripheral groove and define a recess having four sides formed to receive therein an outer periphery of the collapsible container in a substantially parallel orientation with the body when the collapsible container is in the collapsed position.