straightman:
The net result is that there is still no
vectoral addition that blacks out the light bulb simply because you
can exhibit "away from and toward directions."

[.... Ta-da-dum!]

stooge:
A light bulb does not emit coherent light so your
statement is 100% irrelevant to coherent RF sources
and/or coherent laser sources.

straightman:
And if that source WERE entirely coherent?

[Ba-Boom!]

scientist (wearing white lab coat steps from behind curtain):
The observer would still perceive as much light;
and absolutely none of it would destructively/constructively
interfere.

Simply because the source can exhibit "away from and toward
directions" is wholly immaterial. Direction vectors and power
have nothing to do here.

[voice over and closing music]:
Ladies and gentlemen. The experiments performed here
should not be attempted at home. Further, please do not
plonk the stooge on stage as his performance is part of our
audience's instruction and distracts their attention.

We thank your patronage and look forward to more skits. :-)