Lientec LED’s QB-288 LM561C S6 is a single quantum board using 288 Samsung LM561C S6 diodes for DIY plant-light builds. Lientec’s driver guide for its 288‑diode Gro‑Boards specifies about 56 W per board at 1050 mA up to roughly 116 W at 2100 mA with Mean Well HLG constant‑current drivers, and alternative 54 V constant‑voltage operation is also documented. In practical use near 100–120 W, a single board covers close to a 60×60 cm area; Lientec lists similar coverage for its 320‑diode LM561C boards, and its LM561C strip kits show comparable wattage for 60×60 cm frames. This record reflects the board‑only SKU; driver, heatsink, and frame are user‑selected.
