Jogurt Hody Předchůdce filament lamp Deset let Cvičil polovina
Cyberphysics - The Electric Light Bulb
Edison's Lightbulb | The Franklin Institute
Filament Lamps
High Lumen Filament Lamps - TCP Lighting
Filament lamp | electronic device | Britannica
Amazon.com: TCP 3.5W Filament LED Torpedo Blunt Tip (B11) Clear Glass Candelabra Base (E12) 120V Soft White (2700K) Dimmable Decorative Bulb for Chandeliers and Wall Sconces : Industrial & Scientific