iGlow 8 Pack Copper Outdoor Garden 4 x 4 Solar LED Post Deck Cap Square Fence Light Landscape Lamp PVC Vinyl Wood Bronze 1 Ultra Bright White LED. Last up to 100,000 hours. Pre-installed Rechargeable AA Battery, Last up to 2 Years Before Replacing. Automatic Sensor Activates at Dusk with NEW and IMPROVED Solar Panel for Superior Charging Performance Weatherproof  Designed to Protect the Lights from Natural Elements. Easy to Install. No Wiring Required. All Fence Post Attachments and Parts are Included. Dimensions: 5.75 (L) x 5.75" (W) x 4.5 (H). Base Dimensions: 4" (L) x 4" (W). Post Size Fitting: For Wood Posts (Nominal 4 x 4) or Composite Posts ONLY. The Post Size Must Be SMALLER Than 3-13/16" Square. The Bottom Opening of the Post Cap which Fits over the Top of the Post is Exactly 3-13/16" x 3-13/16". These Post Caps are NOT designed for Plastic, Vinyl, or PVC posts. (Tips: Please Measure your Posts before Purchase)