For urban night missions, streetlights are hard to deal with because they illuminate a wide area and are difficult to demolish. Even if you knock out the bottom block the top of the streetlight will float in midair and continue to emit light unless you manage to strike it directly with a moderately powerful weapon. If you can't snuff out the light to gain a tactical advantage then you end up just spamming smoke grenades everywhere like a normal day mission, so maybe you could tweak the lights a bit.
As far as I know the game doesn't support collapsible terrain, but maybe you could make the base of the streetlight "explosive" so that destroying either of the bottom two blocks will collapse the rest of the pole above them?
And maybe you could nerf the durability of the light bulbs at the top of the streetlight so that it's easier to knock them out with regular gunfire.
