Yearld Pro 660W is a bar-style LED grow light for full-cycle cultivation. It draws 660 W and uses Samsung LM301B white diodes paired with Osram 660 nm reds, driven by a dimmable Mean Well driver. The spectrum centers around a neutral 3920 K white enhanced with deep red for canopy penetration. Rated output is 1716 μmol/s with listed efficacy of 2.6 μmol/J, and the passive-cooled design reduces noise and maintenance. Recommended footprint is about 5×5 ft in flower and 6×6 ft in veg. The fixture measures 46.46 × 44.88 × 2.76 inches, weighs about 24.4 lb, and carries a 5‑year manufacturer’s warranty and a >50,000‑hour lifetime. It is positioned as a 1000 W HID replacement while drawing less power.
