Square Root is SunMaster’s 670 W bar‑style LED grow fixture for full‑cycle cultivation. The SQRT670CX model delivers 1,550 µmol/s of photosynthetic photon flux (CRI 85) and operates on 100–277 V autosensing input with 1–10 V dimming. The passively cooled, fanless, IP65‑rated chassis uses eight light bars and is specified for 50,000‑hour life. SunMaster’s launch notes list a fixture weight of about 36 lb. Spectrum is tuned for propagation through flower, targeting even canopy development. The user manual provides electrical tables and installation guidance, including a recommended mounting height of roughly 6 inches above the plant canopy. Designed for commercial grows and advanced hobbyists.
