The RAB Lighting HIDFA-27S-E26-8CCT-BYP is a field-adjustable 27/18/12W LED HID replacement bulb with an E26 medium base, offering selectable 3000K/4000K/5000K CCT and delivering 1,740/2,610/3,915 lumens at CRI80 for commercial and industrial retrofit installations. Ballast bypass operation on 100277V, a 3-pin sensor port for occupancy or daylight controls, and a 50,000-hour rated life are standard; DLC listed (PR1C77FW).