The RAB Lighting HIDFA-205S-EX39-8CCT-BYP is a 135/165/205W field-selectable LED HID replacement lamp (Type B, EX39 mogul base) for post top fixtures on 100277V ballast-bypass circuits, offering selectable CCT at 3000K, 4000K, or 5000K. It delivers 20,25030,750 lumens at CRI80 and up to 150 lm/W efficacy, with field-adjustable wattage enabling contractors to optimize output for specific site conditions. Clear finish with a 50,000-hour rated life reduces ongoing maintenance across commercial outdoor and roadway lighting projects.