Annoying and completely implausible as they are, they're nothing new in SC games.
Indestructible lights? Really? REALLY? That really pissed me off. There was no reason for them to be indestructible. It just reeked of bad design by forcing areas where only one outcome was available. Sometimes they're there for no reason (particularly given enemies have torches) and simply screw you up when it should be a case of following the advice the loading screens give you - shoot them out to create darkness. Particularly during that theater segment.