Hampton Bay 3.5 in. x 3.5 in. Outdoor Black Solar Integrated LED Plastic Post Cap Light with a 5.5 in. x 5.5 in. Adaptor (2-Pack) 2211-NP3 - The Home Depot
Woodland 8" Solar Post Cap by Deckorators - DeckAccent.com
Classic Solar Post Cap - Deckorators
8x8 Post Cap (True 8") | Brown Flat Top Newel Cap for Outdoor Fences, Mailboxes, Decks - Walmart.com
Stone Post Cover Solar Post Cap | Light without wiring!
Deckorators 4-in x 4-in 4.8-Lumen 1-Watt Pewter Solar LED Outdoor Post Cap Light (6500 K) in the Deck Lights department at Lowes.com