They are LED bulbs. 6 X 550 = 3300lm for 36 watts so much better than halogen and they look of so cool dimmed down too.
Antique LED Bulbs, 6W ST64 Dimmable Vintage Edison LED Bulbs, 60W Incandescent Equivalent, Squirrel Cage Filament with 360° Beam Angle, Soft Warm White 2700K, 550 Lumens...