Security lights and surveillance cameras do help. In my town there are quite a few what I call scavenger thieves who will walk down dark streets at night trying out the door handles on all the cars parked along the street. Occasionally they will find an unlocked door and then they quickly grab anything of interest and push it down into their backpack. From what I understand, this kind of burglar usually strikes with 2 or 3 blocks of where s/he lives. I guess they are too lazy to walk farther, not to mention too lazy to get a legitimate job!
And they often wear a backpack and often wear a hoodie type of jacket, even in warm weather. They catch a lot of them, but since most or minors they just get a slap on the wrist and returned to the streets within hours. This type of burglary seems to be more common around the two low rent apartment complexes on the southside of town and in a couple of housing neighborhoods that are mostly rental properties. We never have that in my neighborhood, but I have the place lit up pretty well and I have surveillance cameras and I made sure to place the cameras where would be thieves can easily see they are there.