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).
Appropriate bulb wattage for a Lucas combined stop and tail lamp.
| Identifier | ExFiles\Box 166\5\ img020 | |
| Date | 27th November 1934 | |
| Hs{Lord Ernest Hives - Chair}/Wst. r6016. Hn{F. C. Honeyman - Retail orders}26/I/27-11-34. LUCAS COMBINED STOP AND TAIL LAMP. This uses a 24-watt bulb in the stop lamp section. Do you consider so powerful a bulb necessary please? We are inclined to think that a 6-watt bulb, or at the most a 12-watt, would provide all the illumination necessary, even in bright day-light. We have in mind the consumption of current. We appreciate the stop lamp bulb is only used intermittently, but the presence of so powerful a bulb in our standard lamp on the Bentley and in the lamp we frequently supply for the R-R has been used by the Coachbuilders to justify the fitting by them of powerful bulbs in built-in number plates, and other fittings. Hn.{F. C. Honeyman - Retail orders} | ||