An incandescent lamp made to provide a minimum level of lighting for safety inside homes during air-raid alerts. Red light is emitted from the top, although lamp envelope gets very hot. Characteristics: Brass medium-screw base with glass insulator. Tungsten filament (intact). BT-style envelope with black coating around sides, and red coating on top. Note overspray around base-collar. Lamp purchased by donor at a Shrewsbury, PA antique shop in 1997. Printed on label: "Wabash / Blackout Bulb / For Blackout Lighting / Mf'd. By / Wabash Appliance Corp. / * Brooklyn, N.Y. / Patent Pending".
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