The "strobe light" can just be an inexpensive neon circuit tester. Any light source that flickers with the power line frequency. Fluorescent lights used to work, but I think they have improved them so they don't flicker these days.
The effect, if any, of stylus drag will depend on your particular turntable: platter mass, motor drive power, etc.
The effect, if any, of stylus drag will depend on your particular turntable: platter mass, motor drive power, etc.