Blackout Bulb Sheds Downward Beam of Soft Blue Light
Contenuto
Silvered inside to provide a downward beam that cannot be seen from outdoors, a new blackout bulb offers soft illumination for the home during air raids. The 25-watt bulb is covered with a black silicate coating to prevent light leaks, and its tip is dark blue, shedding a blue light.
- Titolo
- Blackout Bulb Sheds Downward Beam of Soft Blue Light
- Article Title and/or Image Caption
- Blackout Bulb Sheds Downward Beam of Soft Blue Light
- Lingua
- Eng
- Copertura temporale
- World War II
- Data di rilascio
- 1942-05
- pagine
- 65
- Diritti
- Public domain
- Sorgente
- Google books
- Archived by
- Enrico Saonara
