It only applies to Hamburg residents. Note that you are still required to observe all other Hamburg regulations concerning dogs; mainly: keep your dog on a leash outside of designated dog zones (it’s possible and common to get an exemption, but it requires you to pass a test and pay a fee - not something that’s worth it or feasible for only a week), and pick up after your dog.
What are you on about? I’ve switched to LED bulbs about 10 years ago, and I’ve never had to replace a single one…