Bulbrite LED5ST18/22K/FIL-NOS/2 Medium (E26) Base 5W LED Nostalgic Filament ST18 Bulb, Antique Unique LED filament design to create an authentic vintage feel Compatible on dimmers with no collar Can be used in outdoor lanterns, ceiling fixtures and pendants Over 80% energy savings over the standard incandescent 5 watts, 450 lumens, 80 CRI, 15000 hour average rated life, medium (E26) base Maximum overall length is 5", bulb diameter is 2.375"