Meijiu’s QB 240W-288V2-LM301B is a 240‑watt quantum‑board kit using two 120 W boards populated with Samsung LM301B diodes plus supplemental 660 nm reds. The fixture ships with a Mean Well dimmable driver and passive cooling. Meijiu lists a flowering footprint of 2.5×2.5 to 3×3 ft, expanding to about 4×4 ft for vegetative growth. The assembly measures roughly 632×195×15 mm and weighs around 5 kg, suiting compact tents. Rated lifetime is 50,000 hours. Power can be adjusted from low settings up to 240 W via the included dimmer. Package contents typically include two boards, a heatsink, the 240 W driver, dimmer, power cable and hangers. Total LED count is 576 across the two QB288 V2 boards for uniform, high‑density coverage.
