On Thursday, January 21, 2016 at 2:15:53 PM UTC-6, E. Robinson wrote:

16. Maybe that one bulb caused the circuit to blow? Naaah.

I removed the one bad bulb, but, other than that, nothing (that I know of)
has changed between now and two days ago (other than the rain stopped, which
has been constant here in California the past few weeks).

I don't understand, but, somehow, that ingenious trick showed not only
that the circuit breaker was good, but, that the circuit, somehow,
is (at least now) also good.

Makes no sense, I agree.
But that's the data.
I will let you know if it trips again.

I've had bulbs cause a dead-short...the wires that hold the filament get crossed.