Grower's Choice UV-R LED Grow Lights Full Spectrum Bloom Booster SetDescription Introducing the Grower's Choice UV R Bar set. A Horticulturally engineered supplemental bar set, which provides a key spectrum to further promote overall health, robust plant growth, and increased resin production, working much like the 10K finishing bulbs. the new UV R bar set is specifically designed to pair with the ROI E720, plug and play, no additional wiring needed. The bar itself is controllable and dimmable when paired with a GC