I always thought this part was pretty cool because, if you're quick enough, you can push some enemies into the high-voltage shit with a shotgun blast or a flashlight stun as soon as they appear. There's an obvious set-up for it here. But it's actually pretty easy to force them into the power lines even if they're a bit further away. It's especially easy with a flare, because they'll back away a good distance from those all on their own, but even several consecutive pistol shots can knock a shielded enemy back quite a bit. I went through this whole section without actually burning the darkness off any enemies. I suppose that's probably the intended way because it's close-quarters combat, but I think I'd killed at least some of the enemies the "normal" way in previous runs.