✅ 4-Tier Wattage & 35% Energy Savings— With four selectable wattages (400W/320W/240W/100W), this single product line covers full-scenario heights from 10–60FT, eliminating the need for mixed-model purchases. The "one product replaces multiple solutions" design precisely matches wattage to installation height, slashing energy consumption by over 35% and reducing maintenance time by 40%—ideal for large factories, warehouses, and facilities with varying ceiling heights. ✅ 40% Enhanced Central Illumination & Superior Brightness Featuring a dense multi-LED linear array, this 400W high bay light delivers a continuous light band that eliminates point-source brightness gradients, boosting central light intensity uniformity by 40%. With 150 lm/W efficacy and 60,000 lumens of 5000K daylight white light, it precisely directs illumination to work areas—cutting light waste in non-operational zones. Compared to UFO high bay lights, it reduces energy consumption by 15–20% at the same illuminance level, ideal for large factories, warehouses, and workshops. ✅ 20% Higher Efficacy & Advanced Thermal Management— Upgraded with high-efficiency LED chips (≥150 lm/W) and military-grade aluminum cooling architecture, plus high-transmittance glass lenses (>99% light transmittance), this fixture boosts luminous efficacy and heat dissipation by 20%. The aerospace-grade aluminum housing with optimized vents enhances air circulation, minimizing lumen depreciation (<2% at 50,000 hours) and extending lifespan far beyond 50,000 hours—ensuring reliable long-term use in industrial environments. ✅ 0-10V Dimming & PIR Sensor Compatibility (Up to 45% Energy Savings)— Equipped with 0-10V dimming capability (10%-100% seamless, flicker-free dimming), it enhances visual comfort in high-ceiling industrial spaces. Pair with an optional 0-10V dimmer (sold separately) or PIR motion sensor (sold separately) for smart energy control: the sensor detects movement up to 40ft high (25ft coverage diameter), auto-dimming to 30% brightness when no motion is detected. Together, these features cut energy consumption by up to 45%, slashing electricity costs for both large facilities and small shops. ✅ Easy One-Person Installation & Wide US Compatibility— Designed with a slim 4FT profile and lightweight (11 lbs/piece), it supports hassle-free one-person installation via the included adjustable suspension chain—no professional tools required. Compatible with 120-277V wide voltage (UL listed), it meets US industrial/commercial safety standards, making it perfect for factories, warehouses, workshops, garages, retail stores, and basements. ✅ 5-Year Warranty & Durable Construction— Built for rugged industrial use with ventilated aluminum housing, this fixture resists wear and tear for long-term reliability. Backed by a 5-year warranty and 30-day hassle-free return policy, it offers peace of mind for industrial purchasers and individual buyers alike. Enjoy consistent performance with <2% lumen depreciation at 50,000 hours—no frequent replacements needed. This linear high bay light comes with various features, including outstanding energy efficiency, high brightness output, adjustable lighting, a straightforward installation process, and powerful heat dissipation capabilities, along with an excellent lifespan. We offer a 5-year warranty, providing you with ample assurance and eliminating concerns about after-sales issues. This means you can confidently choose this linear light, enjoying its advanced features and reliable performance, and over the next five years, you will receive professional after-sales support.