Newcandescent, PACK of 12 Incandescent 100-Watt Rough Service Frost A19 Light Bulb. 10,000 Hours Life 1094 Lumen. Made in the USA Made in the USA. 10,000 hour average life and 1094 Lumens Newcandescent Brand with 7 support filament mounting Tripple alloy tungsten filament Excellent lumen maintenance Brass base prevents corrosion