Don Coyote was spot in in his/her answer and think we have all joked about being glad of the extra drag when a bit "hot" in the descent. You might be thinking about the nose and turn off lights which are connected to the nose wheel. Surprisingly there are 2 manual switches in the cockpit for these rather than automatically illuminating/switching off with gear extension. Normal SOP is to switch off when gear lever selected up and switched on when gear lever selected down.