Hydrel in-grade lighting from Acuity Brands is designed to be reliable, rugged and impenetrable. Various types and levels of in-grade lighting are available: flow-through in-grade for uplighting architectural and landscape features; performance in-grade for illuminating building facades, walls, trees and similar applications; sealed in-grade for applications demanding minimal aperture size, shallow fixture depth, or require sealed technology; and well lights for flush mounting in planter, open lawn areas or landscape areas.