For those who worry about the inductance of the light bulb, remember that the inductance is proportional to the amount of electrons in the conductor, and therefore, for a length of wire, is proportional to the length and diameter of the wire, as well as the conductance of the wire.
To put it in perspective, the wire in a coiled incandescent light bulb (there are non-coiled ones) is very very thin (sub-milimeter), and about 60 cm long (2 feet). Therefore, the max inductance of the wire is about the same as a single strand of a stranded wire in the PSU wiring or the bench-test box wiring, and thus, much much less than the total inductance of the system, just due to wiring alone. In this way, Toms correctly considered the inductance of the light bulbs to be negligible, when compared to the principal resistance of the light bulb (the resistance of the bulb-wire is high, particularly when it is heated up).