8539 | | Electrical filament or discharge lamps, including sealed beam lamp units and ultraviolet or infrared lamps; arc lamps; parts thereof: | | | | |
8539.21 | | Other filament lamps, excluding ultraviolet or infrared lamps: | | | | |
8539.41.00 | 00 | Ultraviolet or infrared lamps; arc lamps: | | | | |