[Workaphobia]

Since the two lights should be at the same height, it seems that you only need the width of the bounding box to determine their two positions. However I think in general it should be possible to generate multiple bounding boxes for each target by using the virtual window features of the camera. That is, you should be able to cut the area being processed in half and operate only on that side, thus cropping the other light out of the picture.

But I'm not sure - I'm just an alumnus, I've never even plugged in the camera.