Is this design feasible? Door-open warning light circuit with safety interlock switch and general SPDT relay on wall voltage (120VAC)
You can make this simpler, using just a switch and the lamp connected in series. Use a magnetic non-contact switch that is normally-closed instead. Presto, no need for a relay. The 50 mA LED lamp current is easily handled by the switch. Do fuse the circuit and follow codes for wiring.