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HKJN via Amazon [amazon.com] has 6-Pack 4×4 Brightever Solar Post Cap Lights w/ 3 Lighting Modes (Black) on sale for $19.88 – $4.88 off when you apply promo code ULOO7ZBS at checkout = $15. Shipping is free w/ Prime or on orders $35+.
Notes:[LIST][*]After receiving, charge lights in direct sunlight for 1–2 days before first use[*]Select a post base that exactly matches the 4×4 post size