Horticulture Lighting LEDs Cree LED Horticulture Lighting LEDs and other forms of agricultural lighting require application-tuned ratios of spectral content, high efficacy, and long lifetimes. Since these systems are designed to maximize yields for plants and animals, the lighting requires different metrics than products designed around the human visual system. Cree LED delivers a wide range of spectral options and products optimized for these applications with leading efficiency and reliability.