... dark Waterproof, heatproof Solar Outdoor Wall Lamp1.Integrated design of sound and light control2.Auto delay and restore in dark3.Waterproof ... -saving .8.Reliable long lifespan, maintenance-free,low cost9.no strobe and no radiation10.Energy-saving, environment-protecting11.Constant solar energy ... mode in dark, LED will be black. When trigger the sound sensor, the LED turn on and delay around 30 seconds ...