A round form and intricate filament give the Bulbrite 40 Watt G30 Thread Series Bulb distinction in restoration style lighting fixtures. It features a G30 globe shape and medium screw base, while the thread filament creates a warm, bright glow. Other period bulb shapes, sizes and filament types are also available (sold separately). Since 1971, from its headquarters in New Jersey, Bulbrite manufactures and supplies an extensive line of innovative and award-winning light bulbs. Their line of energy efficient light source solutions, educational resources and outstanding service make Bulbrite the bulb supplier of choice for lighting professionals.