HM Quantum Board 240W Pro from Harvest Master is a dimmable quantum‑board LED grow light built for full‑cycle indoor cultivation. The HMQB240WP model draws 240 W and uses a Mean Well driver with four‑step dimming (25/50/75/100%). Its board carries 408 Samsung 301B diodes configured to deliver a broad horticultural spectrum: 3000K and 6500K white with 660 nm deep‑red, 850 nm infrared, and 400 nm ultraviolet support. The passively cooled aluminum plate eliminates fans for quiet operation. The module measures 30 x 60 x 6 cm and weighs 2.75 kg. Retail listings specify a service life over 50,000 hours and a three‑year warranty. Suitable for hobby or craft gardens needing an even light spread without external controllers.
