Waymark White 5" Solar Cap for Vinyl or Wood Posts For that Ambient Lighting to Accent your Yard Solar Powered White Cap with glass panels and mirrored base for better light reflection. Great for accenting a yard or driveway. Easy to replace rechargeable batteries when the time comes. Provides an ambient light to set off the yard. Easy to install. Comes with 2 rechargeable batteries already installed, just remove tab and allow to charge in the sun for at least 24 hours.