![](https://coimages.sciencemuseumgroup.org.uk/312/187/large_thumbnail_smg00043313.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/312/187/large_thumbnail_smg00043313.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/443/393/large_thumbnail_smg00208239.jpg)
Coiled filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/443/942/large_thumbnail_smg00224060.jpg)
Osram "atmostype" tungsten filament lamp
1920
![](https://coimages.sciencemuseumgroup.org.uk/448/460/large_thumbnail_smg00223833.jpg)
Royal Ediswan metal filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/308/982/large_thumbnail_smg00030008.jpg)
Siemens tungsten filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/448/137/large_thumbnail_smg00208358.jpg)
Carbon filament electric lamp
![](https://coimages.sciencemuseumgroup.org.uk/448/532/large_thumbnail_smg00227368.jpg)
Carbon filament Royal Ediswan lamp with cylindrical bulb
![](https://coimages.sciencemuseumgroup.org.uk/448/501/large_thumbnail_smg00224047.jpg)
Coiled Tungsten Bi-Filament Lamp
![](https://coimages.sciencemuseumgroup.org.uk/312/186/large_thumbnail_smg00043312.jpg)
One tantulum filament lamp. BC holder.
![](https://coimages.sciencemuseumgroup.org.uk/444/190/large_thumbnail_smg00227302.jpg)
Two GEC Osram tungsten filament (not coiled) 230V
![](https://coimages.sciencemuseumgroup.org.uk/448/113/large_thumbnail_smg00208073.jpg)
210 volt 200 watt Royal Edison Tungsten filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/312/185/large_thumbnail_smg00043311.jpg)
"Osram-GEC" tungsten filament lamp, BC holder.
![](https://coimages.sciencemuseumgroup.org.uk/312/184/large_thumbnail_smg00043310.jpg)
Tantalum filament incandescent lamp
![](https://coimages.sciencemuseumgroup.org.uk/308/985/large_thumbnail_smg00030056.jpg)
"Standex" tungsten filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/312/126/large_thumbnail_smg00032396.jpg)
Tungsten filament lamp
![](https://coimages.sciencemuseumgroup.org.uk/311/964/large_thumbnail_smg00030255.jpg)
Osram 6-7v
![](https://coimages.sciencemuseumgroup.org.uk/308/984/large_thumbnail_smg00030054.jpg)