The RAB Lighting HIDFA-27S-E26-850-BYP is a field-adjustable 27/18/12W LED HID replacement bulb with an E26 medium base, delivering 1,740/2,610/3,915 lumens at 5000K and CRI80 for retrofit applications in commercial and industrial fixtures. Ballast bypass design operates on 100277V with constant current drive and a 50,000-hour rated life.