The keyless lamp holder is a simple ceiling fixture that is controlled by a switch. This light fixture has the special application of providing lighting in areas such as pantries, closets, basements, and some remote areas. They are called so because Edison developed the key to switch on and off the light. This brought the use of wall switches far from the fixture. When these became more common, the fixtures or lamp holders without the integral switch would be called “keyless” fixtures. It means no switch for operation.