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).
Concluding that a scheme to reduce illumination by halving the current is not justified by the result.
| Identifier | ExFiles\Box 166\3\ img021 | |
| Date | 7th March 1934 | |
| - 2 - E/Lid.{A. J. Lidsey}1/HP.7.3.34. ------------------- illumination by half is negligible. Hs{Lord Ernest Hives - Chair}/Wst confirms this and states that if the current is reduced by one half the illumination disappears to a thin red glow. The complications and cost of the scheme does not therefore appear to be justified by the result. E/Lid.{A. J. Lidsey} | ||