Comment "What did I see?" on Holland Landing Airpark, Canada

Tue, 16 May 2017
What did I see?
Anonymous flyer on Holland Landing Airpark view thread
 

One evening last year I witnessed a small plane lift off from this place. It was evening and dark and what caught my eye was the sphere being towed by this small airplane. It was internally lit an abou 5 feet across, perhaps 100' feet behind the plane. I watched it fly westward toward schomberg for about 10 minutes. Any ideas?

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