The HM Parius 400 is a 400 W foldable LED grow light from Harvest Master designed for even canopy coverage in mid‑size spaces. Retail specifications list a full‑spectrum output with supplementary 660 nm red and Mean Well driver implementation, using Edison diodes. The fixture is rated at 883 μmol/s PPF and 2.2 μmol/J efficiency over a 120×120 cm area, with approximately 770 μmol/m²/s PPFD at 40 cm. Physical dimensions are 90×90×6 cm and weight is 20 kg. It operates at 220–240 V, 50–60 Hz, and relies on passive cooling across eight independent heatsink bars. Claimed service life is 75,000 hours. Suggested hanging heights are 60–70 cm for seedling/vegetative stages and 40–50 cm for flowering.
