Term - Joule (Watt-second) |
| Joule (Watt-second) | SWPP Photographic Glossary | Thursday 8th May 2025 |
|
Joule (Watt-second)Indicates the energy content of the storage capacitors in an electronic flash. One Joule is the light output given by one watt burning for a second. Therefore a flash unit with a storage capacity of 300 Joules can supply the power to light a 300W lamp for one second. It doesn't take into account any electrical loss between the flash capacitor or flash tube, or the efficiency of tube and reflector.
|
|
Information provided by: SWPP |
