1. 4x4 post solar lights Solar post cap lights measures 4.25x4.25x2.28 inches. You can mount the solar post cap lights on 4x4 (actual 3.5x3.5) inchs wooden post caps, or on 4x4 (actual 4x4) inches vinyl post cap. Note, does not fit 5x5 vinyl posts. 2. Cool White Mode Solar deck post lights cool white modes. Fence post solar lights with 8 led beads is capable of emitting 15 lumens of bright light at the start of dusk, making it perfect for outdoor lighting and garden decor, deck decor, fence decor, patio decor. 3. Solar Post Lights Outdoor 4x4 Solar post cap lights outdoor 4x4 are made of high quality pp plastic, which can resist pressure and water, with a waterproof rating of ip44, sealed well and will not rust, ensuring that the deck post lights can be used for a long time in outdoor waterproof. 4. Outdoor charging and lighting 4x4 solar post cap lights can last all night lighting in full charge state. It is recommended that you install the deck post lights solar powered 4x4 in a welllit location so that vinyl fence solar lights can stay charged efficiently.