When you turn on the switch, the current that flows through your light bulb comes from a power plant somewhere.
(you; turn on; the switch) (the current; flows; through your light bulb) (the current that flows through your light bulb; comes somewhere; T:When you turn on the switch)
you the current the current that flows through your light bulb
turn on flows comes somewhere
the switch
through your light bulb
T:When you turn on the switch