Switch that resets to 'on' after power loss
If you don't mind using a bit of power in a relay coil while the lamp is off you can do it like this:







simulate this circuit &ndash; Schematic created using CircuitLab

Using a DPDT relay, this circuit starts with the lamp 'on'.  Pressing the button activates the relay, turning the lamp off.  The second pole on the relay is used to hold the lamp in the off position until power goes away...at which point the whole thing resets.