So I think this is slightly related to this question but I'm not sure I fully understand the rules controlling lighting redstone lamps.
Say I have a tower like this:
Right now, I can light it up (as in the picture) by putting a redstone torch in the bottom middle and putting a solid block in the top middle. Is there any way to light it up from a redstone signal? If so, how? If not, why not?
(I always seem to get really frustrated with redstone because it is so convoluted with so many corner cases...)
Also as an additional (not sure if possible) restraint, it'd be nice to be able to keep the redstone input within the 3x3 bounding box (coming from below).