Yep. Lights on - like my first trip through Return to the Haunted Cathedral. Which is now one of my all time favourite missions.
The only consolation is that you can save, but there's still nothing worse than picking a lock and realizing that a zombie has snuck up on you - or worse, that one of those dead Hammers is swinging at you from behind.
The only thing is they took out the ghost Hammers' whispering encouragement, a major source of creepiness, and also when you destroy a zombie in Thief3 it doesn't blow into chunks all over the place. Well, ok, blowing zombies into chunks IS pretty tasteless, but I sorta liked it.
Keep them mowing blades sharp...