LED high bay lights are the definitive solution for spaces with ceiling heights of 6–30 meters. When selecting, evaluate: (1) Efficacy: ≥150 lm/W for new installations—lower efficacy means higher operating costs. (2) Lifespan: L70 ≥50,000 hours with ≤30% lumen depreciation. (3) Beam: 90–120° for warehouse aisles, 60° for high-rack storage. (4) IP Rating: IP65 for dusty/humid environments, IP54 minimum. (5) Driver: Mean Well, Philips, or Inventronics with PF≥0.95 and surge protection ≥4kV. (6) Certifications: UL/ETL (North America), CE/ENEC (Europe), CCC (China), DLC Premium for rebates. (7) Smart: 0-10V/DALI dimming + microwave occupancy sensor + daylight harvesting. Price range: $30–200/unit depending on wattage and brand.