The Sayhon SH4000 is a full‑spectrum LED grow light using Osram OSCONIQ S 3030 diodes. It carries 1,568 LEDs combining 2700K and 5000K whites with deep red 660 nm, blue 460 nm, plus a switchable supplemental bar for UV‑A 390 nm and IR 730 nm. Average power draw is 410 W (±5%), with stated efficacy up to 2.7 μmol/J and a peak PPFD around 2,258 μmol/m²/s. Sayhon lists overall coverage of 5 × 6 ft and recommends 5 × 5 ft for vegetative growth and 4 × 4 ft for flowering. The fanless aluminum heatsink fixture measures 43.5 × 11.8 × 2.4 inches and includes a UL‑listed driver with 5–100% dimming. Marketed as a 1000 W HPS replacement.
