![electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/fBEsA.jpg)
electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange
![What is difference single filament VS double filament? - CBR Forum - Enthusiast forums for Honda CBR Owners What is difference single filament VS double filament? - CBR Forum - Enthusiast forums for Honda CBR Owners](http://forums.themustangsource.com/attachments/f691/118555d1346491669-sequentials-3rd-bulb-not-lighting-turn-dual-filament-bulbs.jpg)
What is difference single filament VS double filament? - CBR Forum - Enthusiast forums for Honda CBR Owners
![0203105 White Indicator Light for Double Filament Bulb - The 2cv Shop | Citroen 2CV Specialists | Spares Parts 0203105 White Indicator Light for Double Filament Bulb - The 2cv Shop | Citroen 2CV Specialists | Spares Parts](https://the2cvshop.co.uk/wp-content/uploads/2021/03/0203105_index_1.jpg)
0203105 White Indicator Light for Double Filament Bulb - The 2cv Shop | Citroen 2CV Specialists | Spares Parts
![Neolux 380 Twin Filament Light Bulb - 12v 21w - Trailerstuff | Trailer Parts & Accessories Online | Ireland Neolux 380 Twin Filament Light Bulb - 12v 21w - Trailerstuff | Trailer Parts & Accessories Online | Ireland](https://www.trailerstuff.ie/image/cache/catalog/product/Lighting/Bulbs/240-01239-550x550.jpg)
Neolux 380 Twin Filament Light Bulb - 12v 21w - Trailerstuff | Trailer Parts & Accessories Online | Ireland
![electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/H3BO9.jpg)
electrical - How does a lightbulb with two filaments know which one to light up? - Motor Vehicle Maintenance & Repair Stack Exchange
![Amazon.com: Set of 2 - Mini 1157 Turn Signal Bulbs - Dual Filament Amber - Motorcycle ATV Scooter : Automotive Amazon.com: Set of 2 - Mini 1157 Turn Signal Bulbs - Dual Filament Amber - Motorcycle ATV Scooter : Automotive](https://m.media-amazon.com/images/I/61PIdnvUvYL.jpg)
Amazon.com: Set of 2 - Mini 1157 Turn Signal Bulbs - Dual Filament Amber - Motorcycle ATV Scooter : Automotive
![2x P21/5W BAY15D 380 12v Clear Stop Brake Tail Light Car Bulbs (Staggered Pins, Dual Filament) : Amazon.co.uk: Automotive 2x P21/5W BAY15D 380 12v Clear Stop Brake Tail Light Car Bulbs (Staggered Pins, Dual Filament) : Amazon.co.uk: Automotive](https://m.media-amazon.com/images/I/61J5lPGi3lL._AC_UF894,1000_QL80_.jpg)
2x P21/5W BAY15D 380 12v Clear Stop Brake Tail Light Car Bulbs (Staggered Pins, Dual Filament) : Amazon.co.uk: Automotive
![Amazon.com: Speedway Motors Universal Compact Double/Dual Filament 1157 Tail Light Bulb : Automotive Amazon.com: Speedway Motors Universal Compact Double/Dual Filament 1157 Tail Light Bulb : Automotive](https://m.media-amazon.com/images/I/41XmacUl0CL._AC_UF894,1000_QL80_.jpg)