Definately a military reference. My grandmother, who was born in 1927 told me that returning soldiers would look for porch lights and if no light was on, then the spouse would either not want you to return or had somebody over. If they were alone and wanted a return, then 2 porch lights would be left on so the returning soldier knew that it was ok to enter the house or was welcomed home. that's all I could get from her about this story before she died. But i suspect there are many reasons for leaving 2 porch lights on back then in the 1940's.
Definately a military reference. My grandmother, who was born in 1927 told me that returning soldiers would look for porch lights and if no light was on, then the spouse would either not want you to return or had somebody over. If they were alone and wanted a return, then 2 porch lights would be left on so the returning soldier knew that it was ok to enter the house or was welcomed home. that's all I could get from her about this story before she died. But i suspect there are many reasons for leaving 2 porch lights on back then in the 1940's.