Light Posts??

On the light posts in the webcam on maXair, what are those grey items on the posts?

http://www.cedarpoint.com/public/inside_park/webcam/camera3.cfm

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Keep arms down, head back, and hold on for May 7.

http://www.pointbuzz.com/cpplace.aspx?mode=thread&TopicID=16336&page=2

http://www.pointbuzz.com/cpplace.aspx?mode=thread&TopicID=16323&page=2