Meijiu’s QB 240W – Samsung LM281B + Epistar 660 is a single-board quantum panel designed to replace a 600 W HID. It uses Samsung LM281B white diodes paired with 660 nm deep‑red Epistar chips, delivering a listed efficacy of 2.65 µmol/J and total output of 1177 PPFD. The NB240 board is dimmable (30–240 W) with an Inventronics driver and supports 0–10 V control; Meijiu also offers RJ‑port external controller compatibility. Recommended coverage is 2.5' x 2.5' to 3' x 3' for flowering and up to 4' x 4' for veg. The aluminum heatsink fixture measures 24.88 x 9.84 inches and runs passively cooled. Rated lifetime is 50,000 hours. This configuration suits compact tents needing balanced, full‑spectrum light.
