Monitoring Moves: New Cameras?

I ventured to Greenhill Park the other evening to check out the fields that Worcester Youth Soccer League uses for soccer, and while I was driving along Skyline Drive, towards Worcester Technical High School, I noticed some weird hanging "lights".

Well, after looking at them for a bit, I still couldn't figure out if they were lights or cameras?

My hunch is that they might be some sort of hybrid light with a night vision type camera that can see people as they're walking on the sidewalk.

I'm not sure how long they've been there, but for as many times that I've driven along Skyline Drive, this is the first time I noticed them.

So, what do you think they are?