On the '49 Triumph, I used to have to light a match to go see if the lights were still on. The lights took about 2 more amps than the dynamo could make, so it all balanced out at around 4 volts.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python
The lights took about 2 more amps than the dynamo could make, so it all balanced out at around 4 volts. 
