The BLE led grow light is dimmable and distributes broad, full-spectrum light anywhere from 0% to 100% while maintaining efficiency. Dim using the high quality LED Adapter and Master Controller to create ideal lighting levels as needs change from veg to bloom for various crops throughout their growth cycles. The Gavita E-Series LED Adapter – 100-277 V (sold separately) is required for each fixture when using the controller; non-controlled fixtures simply operate at 100%. You can connect up to 500 – 1,000 LED fixtures, depending on the controller, using a setup with daisy-chained splitters.