Bulbrite NOS40-1910/SMK 40-Watt Nostalgic Edison ST18 Bulb, Vintage Thread Filament, Medium Base, Smoke Included in the box: 1- 40 Watt Incandescent Nostalgic Thread ST18 Smoke Perfect accent for any antique decor Nostalgic bulbs available multiple bulb shapes, filament styles, and-wattages to ensure you find the perfect vintage light for your application 40 watts; 135 lumens; 100 CRI,; 3,000 hour average rated life; Medium (E26) Base Dimensions: Maximum Overall Length is 5.13 (Inch); Bulb Diameter is 2.25 (Inch)