HM RB-S 240 is Harvest Master’s 240 W, fanless LED from the Silent LED Series, presented as a red‑boost edition of the HM PRO platform. It uses Edison diodes with Mean Well drivers and a dual full‑spectrum array supplemented by 660 nm deep red to support flowering. The fixture is listed at 2.57 µmol/J efficacy with a 50,000‑hour lifetime and operates on 220–240 V, 50–60 Hz. Distributor testing indicates roughly 1145 µmol/m²/s PPFD at 50 cm and 720 µmol/m²/s at 70 cm over a 100 × 100 cm test area. The RB-S 240 suits moderate‑power applications where silent operation and simple deployment are priorities, while retaining brand support and a three‑year warranty.
