Waterproof Landscape Graden Floodlight Outdoor Recessed Lamp Well-Lights Solar LED Underground Light. In-grade or in-ground well lights are discrete landscape lights installed in the ground, concrete, or underwater to highlight various landscape and architectural features. Ground well lights are an integral part of any outdoor lighting system. These lights expand outdoor living space, boost curb appeal, and increase property value by illuminating vertical features like pillars, trees, and walls. You can install LED well lights on or near paths, walkways, and driveways for added safety and aesthetic appeal.