Meijiu 480W LM281B Quantum Board

The Meijiu 480W LM281B Quantum Board runs two full-spectrum white boards of Samsung LM281B diodes with Deep Red at 660nm, over a 1.2m x 1.2m grow area. Meijiu position it against a 1000 watt HID.

The control side is better than the price bracket suggests. An Inventronic dimmable supply is included, and the fixture takes an external RJ45, RJ14 or BT networking controller that handles light timing, dimming in 1% increments, temperature safety cut-off and a Sunrise & Sunset mode — across up to 100 fixtures from one controller.

The supply is auto sensing across 120VAC and 240VAC, and cooling is passive. Meijiu describe the board as a longer design for more even coverage with diffused light, which is the usual trade against a shorter board with a brighter middle.