SolarXtreme 640

California LightWorks SolarXtreme 640 is a 2025 full‑spectrum LED grow light designed for 4×4‑ft flowering coverage. The fixture uses premium LUMILEDS diodes and delivers a rated PPF of 1,792 μmol/s at 2.8 μmol/J PPE. It draws 640 watts and is dimmable via onboard knob or the optional SolarXtreme Controller through RJ12 daisy-chain ports. The redesigned six‑bar frame ships fully assembled and measures 43.8 × 44.8 × 1.89 inches (about 14 lb), making it a straightforward fit for medium tents and rooms. The SolarXtreme 640 operates on 120V or 240V and targets uniform, high‑intensity output across the canopy. Ideal for veg through bloom where consistent performance and simple operation are preferred.