What's hidden in the light fixtures at Legal's Seafood restaurant?

Why are there coaxial cables coming out of some of the Legal's light fixtures? Why aren't all the light fixtures producing light. Is this illegal?

Legal's light fixtures

Legal's toilet

images captured with wearable wireless webcam apparatus, Legal's Sea Foods, Kendall Square, Cambridge; (c) copyleft, right, and center, s. mann, 1995

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