Acrylic material: With a transparent acrylic tube that displays the gorgeous bubble effect. Garden update: The stakes can be put in soft ground, gravel or wood chips. Garden solar lights: Get an illuminating pair of garden solar lights! Eight hours of power: Powered for up to 8 hours from the sunlight, meaning no added energy costs! Stainless steel: High quality stainless steel base. Weatherproof: Their IP65 rating means that they're weatherproof! | 2 Bubble Effect Garden Stake Solar Lights | Wowcher