On Glowing Driveways

Photoluminescent Stone--Jinan Chenghao Technology Co., Ltd.: "  Glowstone is for use in Concrete, Pavers and Terrazzo products as an exposed aggregate.       Glowstone enhances safety by marking the pathway in Low Light Level conditions.       In daylight the Glowstone has an Off-white colour and can be supplied in after-glow colours of       Yellow-green and blue-green."

'via Blog this'

Very cool stuff