Non excited synchronous motor
You could make yourself a simple strobe with a couple of LED that would work like a flouro tube.







simulate this circuit &ndash; Schematic created using CircuitLab

R2 would need to be a 2W resistor, R1 a 1/4W
Di1 is a 7-9 volts DIAC BSOD-T112 from Digikey

D1 and D2 could be any LED with a VF @ 20mA of around 2.2-2.6V. You probably can't use White LEDs.
The conduction angle for the LEDs should be about 45-50deg. 

At 50Hz you get 100Hz strobes and at 60Hz you get 120Hz strobes.