The YR-LH420 Series linear LED high bay luminaires are designed to offer exceptional optical performance with the enhanced benefits of LED lighting, including maximum energy savings, reduced maintenance costs, and extended system life. The YR-LH420 features a heavy duty gauge housing that provides added protection and superior heat dissipation for LED components. The anodized, extruded-aluminum housing is designed in a low-profile form factor for a less obtrusive installation for open ceiling lighting and racked aisle applications including warehouses, industrial facilities, retail establishments and gymnasiums. YR-LH420 offers highly competitive system lumen per dollar performance by utilizing the high efficacy Samsung LEDs that redefines lumen density and reliability for exceptional performance and color quality. The impact resistant, diffused acrylic lens provides uniform light distribution with no pixelation and a minimal amount of light loss. The high efficiency Mean Well LED drivers are mounted in an isolated, vented compartment for optimal thermal dissipation. YR-LH420 Series linear luminaires are available in 100W, 150W, 240W and 320W wattages with a luminous efficacy of 110 lumens per watt.