Lientec LED’s Quantum Cube 2706 is a square horticulture LED board intended for modular grow-light builds. Each board carries 270 Samsung LM301H or LM561C S6 white diodes, plus six Osram Oslon SSL add-ons (4×660 nm deep red, 2×720 nm far red) to support flowering. The PCB measures 140×140×3(6) mm and weighs 0.1 kg. Recommended coverage per board is 40×40 to 60×60 cm; larger footprints are achieved by combining multiple cubes. Electrical spec is 40–55 V DC with up to 2.7 A drive; Lientec lists a maximum of about 125 W per board and roughly 100 W at 2.1 A, with an advised operating range of 1050–2100 mA. Offered base spectra are 3000 K (flower) or 3500 K (full‑cycle). A “Single Kit” variant pairs the board with a ~75 W driver.
