I can have access to the peaked area, but not easily. I should try just seeing if my flag is illuminated with the light I have, that is a good point about no overhang.Without an overhang the flag would probably be illuminated by the light below. My flag can be seen with just my outdoor light on & the streetlight
Is there an attic?
Doi you have acces to the peaked area from inside?
I see a window on the left, so you should have some sort of access
So a small spotlight off to one side might work, or a decorative (up)light