From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Rate of discharge when fitting more powerful bulbs.
| Identifier | ExFiles\Box 62\3\ scan0152 | |
| Date | 19th January 1931 guessed | |
| EFC/ADSO.1.31 contd. -3- There will probably be certain instances where owners will fit the more powerful bulbs, but the only disadvantage, so far as we can see, is that the rate of discharge under certain conditions will then be a little more than with the 48. EFC. | ||