[Nyx]

You're right, in that it will be a small amount of power in any of the branches, and with a sane copper branch/power level/bulb choice the bulb's won't illuminate..but, and thsi is something I have to tell all my students...

Electricity Follows all Paths given to it, you cannot EVER assume that it follows only a given path. (Even with a diode you should consider what happens if it fries) That's how you break things, and with larger power levels, yourself.

The electricity left in those other branches would be enough to illuminate some low-wattage LEDs or fry sensitive electronics. Basically don't assume that electricity JUST follows the path of least resisitance, if that was true, the original circuit with the #7 lamp would ONLY illuminate that #7 lamp anyway!

The bulbs in this circuit are the tiny little 1.5V bulbs.