dobbelfilamentpære

A dobbelfilamentpære, also known as a dual-filament bulb or a two-filament bulb, is a type of incandescent light bulb that contains two separate filaments within a single glass envelope. Each filament is designed to produce light at a different wattage or brightness level. Typically, one filament is of a lower wattage, providing a dimmer, less intense light, while the other filament is of a higher wattage, producing a brighter light.

The primary advantage of a dobbelfilamentpære is its versatility. By switching between the two filaments, a single bulb can serve multiple lighting needs. This is often achieved through a standard light switch. For example, a single flick of the switch might illuminate the lower wattage filament, providing ambient or nightlight illumination. A second flick, often after the bulb has been turned off and on again, engages the higher wattage filament, offering brighter task lighting.

Dobbelfilamentpærer have been commonly used in applications where varied lighting levels are desirable without the need for separate fixtures or dimmers. Examples include household lamps, such as bedside lamps or floor lamps, where a softer light might be preferred for reading or relaxation, and a brighter light for general illumination or specific tasks. They were also used in some automotive applications, such as tail lights, where one filament could provide running lights and the second, brighter filament could be used for brake lights. Due to the increasing prevalence and efficiency of LED technology, dobbelfilamentpærer are less common in new installations but remain relevant in some older fixtures and for specific replacement needs.