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).
Specification table for various lamp and bulb combinations with associated measurements.
| Identifier | ExFiles\Box 61a\1\ scan0013 | |
| Date | 19th October 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}31/L191014. Sheet. 3 Lamp. | Bulb. | Distance from screen. | Outside dia. of lamp front | Dia. of front glass --- C.A.V. small type F.{Mr Friese} | No.11 C.A.V. (Ediswan) | 16' 9" | 11" | 9" ditto. | No.13 ditto. | 22' 0" | | ditto. | 24 C.P. Lucas (Osram) | 17' 4" | | --- C.A.V. large type F.{Mr Friese} | No.11 C.A.V. (Ediswan) | 15' 3½" | 12¾" | 10" ditto. | No.13 ditto. | 19' 11" | | ditto. | 24 C.P. Lucas (Osram) | 15' 8½" | | --- C.A.V. large type G.{Mr Griffiths - Chief Accountant / Mr Gnapp} | No.11 C.A.V. (Ediswan) | 14' 10¼" | 12½" | 9⅜" ditto. | No.13 ditto. | 19' 2½" | | ditto. | 24 C.P. Lucas (Osram) | 14' 9" | | --- C.A.V. small type F.{Mr Friese} fitted with chemically etched front glass to reduce glare. | No.11 C.A.V. (Ediswan) | 12' 6" | 11" | 9" ditto. | No.13 ditto. | 18' 3" | | ditto. | 24 C.P. Lucas (Osram) | 15' 5½" | | --- Bleriot. Reg. No. 626046 | No.11 C.A.V. (Ediswan) | 16' 9" | 13¼" | 10" ditto. | No.13 ditto. | 23' 6" | | ditto. | 24 C.P. Lucas (Osram) | 15' 5½" | | --- Lucas self contained acetylene lamp No.786 with 4⅜" lens mirror reflector | Lucas No.46 Bray Roni burner. | 6' 6" | 9-5/16" | 7⅜" | ||