Clamp-on grow lights attach to frames, furniture, suspended cables or chains, or other objects and supply light to grow plants indoors. Also called clamp lamps, they supplement other grow light fixtures to increase brightness and focus light on specific areas. The clamp allows easy relocation and adjustment. The fixtures accept grow light bulbs or have built-in LED arrays that emit light in color spectrums optimal for seedling growth, stem and leaf growth, or budding and flowering. They are rated for wet locations to withstand high humidity and resist water sprays. Grow lights are used in greenhouses, hydroponic gardening, vertical farming, farm-to-table and urban farming, agricultural research, and other indoor growth applications.