The flexible cable of grow light string fixtures curves along or wraps onto surfaces to meet light coverage requirements for indoor plant growth. String lights can join together to add length as lighting needs change. They commonly hang from shelving, frames, or hooks and secure with cable ties so they can be rearranged or relocated. The fixtures accept grow light bulbs or have built-in LED arrays that emit light in color spectrums that are 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.