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ilp archive : journals

public lighting no. 6 vol. 2
June 1937

Editorial p43
Publicity vs. Visibility
Description of the problem posed by Cold Cathode type lighting i.e. Neon Signs, which have been brought into extensive use. Such installations have conflicted with traffic lights causing potential danger to drivers and pedestrians. The question has now been raised officially by Middlesex County Council. From the reply from the Minister Of Transport it "would appear that the provision in section 48 of the Road Traffic Act, 1930, does not empower local authorities to refuse permission to exhibit illuminated advertisements on the ground of conflict with traffic signs." The Association of Municipal Corporations and the Metropolitan Boroughs Standing Joint Committee propose to approach the Ministry Of Transport with a solution to the problem; Side Streets And Main Roads: Passage from bright main road to darkish light of side sreet has been found to have an injurous effect on the health of drivers. Many local authorities can only afford a form of lighting which is of benefit to pedestrians. There have also been objections to the colour of lamps - but does this really matter when the pedestian can be seen by the driver? Visibily is the most important factor; Thirty Mile Limit Signs: It is difficult to see the reflective 30-mile limit signs as they are positioned on the side of the road in the dark. It has been suggested that these signs would be more effective if suspended over the roadway. (Includes pictures of illuminated speed-limit and directional signs over a roadway); Dotted here and there: a comment on some county lighting where a local engineer stated that his lighting was "dotted here and there." "He admitted that it was not uncommon to find cases where half the light from a lamp placed on the footpath on the outskirts of town was lost in an ajoining field, while the far side of the road was quite dark. One of his listeners opined that if road lighting is not very good it was better to have none at all."
Lighting: Social Comment, Lighting: Legal, Lighting: Health

Illuminated Advertisements p45
Full details of the communications between The Law Committee of The Association of Municipal Corporations and The Ministry Of Transport concerning the interference of cold-cathode illuminated adverisments and traffic signals. The council were not happy with the MOT's reply and wanted further action to be taken to secure the necessary legislation giving highway authorities power to control the erection of adverisements signs.
Lighting: Legal

Bishops Stortford New Lighting p45
Full details of the Bishops Stortford lighting.
Lighting: Installations

Sieray QH - H.P. Mercury Type Lamps p46
Announcement has been made of a new type of high pressure mercury electric discharge lamp, the Sieray QH Lamp, in two sizes. The inner tubes are made of a special grade of quartz premitting their being run at higher working pressures than is possible with the hard glass used for the older lamps. The increased pressure results in the attainment of higher efficiencies than can be obtained with hard glass lamps. The quartz tubes are enclosed in pearl finished outer bulbs of the type used for tungsten filament lamps.
  • The arc light source is short and very concentrated.
  • The time taken to reach full luminous output is shortened considerably.
  • The cooling time after switching off and consequently the lapse in time before restriking are considerably reduced.
  • The lamps can be used effectively in standard types of fitting designed for use with gas filled lamps. It will be possible to use the new lamps in existing fittings.
They are fitted with a special 3BC bayonet cap to prevent accidential insertion into a holder wired for tungsten filament lamps.
Lighting: Lamps

Gas And Coke Company p46
Details of the various installations administrated by The Gas Light And Coke Company including Westminster, Chelsea and Hendon. New installations conform to BS 307:1937 or the MOT Committee's recommendations but some boroughs have their own specifications ranging from Class E and Class D for main streets, Class F for arterial roads and Class G for residential areas. There has been an increasing use of refracting glassware and multi-factet reflectors. Hot platinum coil ignition is used. Gas-lighted guard posts and traffic signs to MOT requirements are also being widely employed. Photometeric testing is carried out regularly every week and a large amount of testing is carried out by Watson House Research Laboratories. Tests in roughly 40 streets are made each week, about half the tests being for test point and maximum illumination, and the remainder for candle power at fixed angles. At Watson House Laboratories, complete tests of various units are made, and installations are planned from the data obtained.
Lighting: Installations

The 1937 Conference Folkestone by HOD p47-p48
Details of the forthcoming conference.
APLE: Conference

Coronation Booklet p48
The British Electrical Development Association has issued a souvenir booklet for childen commemorating the Coronation of King George VI and Queen Elizabeth. It traces the history of light and illumination.
Lighting: Publications

APLE Conference p49-p50
Pictures of the key people who will be attending or giving papers at the conference.
APLE: Conference

Sodium Lighting At Hove, Sussex p51
Full details of an installation in Hove, Sussex.
Lighting: Installations

Street Lighting At Wembley p52
Full details of an installation in Harrow Road, Wembley.
Lighting: Installations

The Tribute Of Light p52, p57
Argues that some of the temporary floodlighting schemes erected for the coronation should be made permanent as a tribute to the King. "It is a wonderful idea. It will provide more employment for our workers; it will symbolise the inauguration of a new era of progress as nothing else could; it will permanently improve the streets, roads and buildings of communities that have chosen this means of celebrating the Coronation." Very much written to promote electricity.
Lighting: Events, Lighting: Installations

Coronation Floodlighting p54
"Gas and Electricity Tranform Public Buildings throughout the land" Supplimentary four page booklet of black and white photographs of various floodlighting schemes to mark the coronation.
Lighting: Events, Lighting: Installations

Improved Street Lighting In Southport p57
Full details of a gas installation in Southport.
Lighting: Installations

Improved Street Lighting In Lambeth p58
Full details of an electric discharge installation in Lambeth.
Lighting: Installations

Permanent International Association Of Road Congress p58
Details of the Eighth International Road Congress which will be held in The Hague, Netherlands from June 19th to July 2nd, 1938.

Gas Lighting For Coronation p58
Further details of gas floodlighting schemes which were temporarily erected for the Coronation. Over 100 gas undertakings carried out special lighting for the event. In many towns the street lamps were lit on Coronation night free of charge to the public.
Lighting: Events, Lighting: Installations

The New Osira Lamps p59
New Osira 80W and 125W High Pressure (H.P.) Mercury Vapour Electric Discharge Lamps have been designed and developed by the GEC for industrial and street lighting. Thye have an extrememly high efficiency and give a light output three times as great as that of tungsten filament lamps. Their introduction now marks a complete range of lamps which will match up side roads with main and secondary rods. The lamps are similar in shape to the 150W and 200W tungsten filament pearl lamps and can be used in ordinary Gecoray Reflectors and enclosed pendant fittings. The only difference is that they have a 3-pin bayonet cap. Includes information about the new Di-Fractor lantern.
Lighting: Lamps

Science Museum, S. Kensington p59
Brief notes about a paper given at the museum in connecion with the Electric Illumination Exhibition by Mr. Lennox, President of the APLE. The following points were made:
  • The country spends five million pounds a year on street lighting.
  • The insurance companies spend twenty-five million per year on road accident claims.
  • 56%-58% of accidents in winter months occur during darkness. Roads must be lighted that adequate visibility for quick perception is provided at 45 miles per hour, without the use of headlights.
  • A motorist travelling at 45 miles per hour has only 1½ seconds which to see and avoid any obstruction 100 yards ahead.
  • Objects more than 15 feet distant are normally seen as dark objects against a light background.
  • The nature of the road surface has a very important bearing on the design of the street lighting installation.
  • Both sides of straight roads should be provided with street lamps. Curved roads should be lighted by lamps on the outside of the bends.
Statistics: Road Data

Street Lamps As Warning Signs p59
A town in the Midlands is using an experimental street lighting system on a large scale where the streets will be illuminated by mercury vapour lamps and crossways and corners illuminated by sodium lamps. As a result of previous experiments with a system of this nature, the RAC took up the matter with the Ministry Of Transport, suggesting if it approved the principle of indicating danger points by street lighting of contrasting colours, a standard method could be universally adopted through the country. The Minstry referred the matter to the Departmental Committee on Street Lighting
Lighting: Colour, Lighting: Installations

Low Wattage Madza Mercra Lamps p60
Originally developed in 400W only and found application in street lighting, industrial lighting and floodlighting. Almost immediately it was felt that lower wattage lamps were needed for less important roads and 150W and 250W versions were produced. 80W and 125W Mazda Mercra lamps have now been introduced which are particularly suitable for the lighting of side streets. The lamps are housed in bulbs the same shape and size as standard gas-filled lamps, and can be used in equipment designed for 150-200W gas-filled lamps. Running up time and cooling times are reduced, and the new lamps can be run in any position. The three-pin bayonet cap prevents the lamps from being accidentally inserted in an ordinary lampholder. BTH chokes are required and condensers can be used to improve the power factor. The BTH County Junior general purpose lantern has be introduced for this lamp.
Lighting: Lamps

Well-Lighted Refuges p60
Details of the Cornolith pre-cast concrete island refuges by Johnston Brothers Limited. Their appearance almost exactly resembles granite.

Street Lighting in Edinburgh by W. J. Wilson p61
Details of new electric installations (including Mercury Vapour Discharge and gas-filled tungsten) and an experimental high-pressure gas system.
APLE: Installations

Newly Elected Members p62
Newly elected members, junior members and associates.
Lighting: Personnel, APLE: Organisation

Correspondence p62
In a letter entitled Gorgonzola Lighting, A Lay Reader where they complain about the greenish glow of medium-pressure mercury discharge lighting. "Psychologically, thsi has a very disturbing effect upon one's mentality, while facially it produces a horrible distortion." The reply from the editor notes that personal appearances are only secondary over the actual lightign of the road surface giving safety to the road user; J. F. Colquhoun (Sheffield Lighting Engineer) draws reader's attention to the new British Standard Specification for Tungsten Filament General Service Electric Lamps.
Lighting: Colour

Parliament Square Lighting p62
Small footnote mentioning that the lighting levels in Parliament Square will be increased for the Coronation.
Lighting: Installations, Lighting: Events

Gas Lighting In Lambeth p63
Full details of a high-pressure gas installation in Lambeth.
Lighting: Installations

Gas Supplies In Air Raids p63
Gas undertakings had been invited to consider means of maintaining an uninterrupted gas supply for lighting, heating and other purposes in the event of enemy attacks. The Institution Of Gas Engineers had set up a committee (the Gas Works Safety Rules Committee) to consider the problem. The Instutution had been in touch with the Home Office on the question of maintaining street lighting during aerial attacks. No definite policy had been formulated so far by the Department, but it had been widely assumed that some form of instantaneous extinction of steet lights might be required.
Lighting: Installations, Lighting: Control

Promenade Lighting At Aberystwyth p64
Full details of a REVO installation in Aberystwyth.
Lighting: Installations

Parliament In A New Light p64
Details of the floodlighting of the Terrace of the Houses Of Parliament for the Coronation. The installation was planned by Siemens Electric Lamps and Supplies, Ltd. in conjunction with H.M. Office Of Works. Also lists other London buildings which were floodlit.
Lighting: Installations, Lighting: Events

A Visit To The Mazda Lamp Works p64
Details of a day spent at the BTH works in Rugby. The visit included the factory where tungsten filament lamps were made - development has been principally along the lines of increasing efficiency and life uniformity, and the greatest advance has been the introduction of the coiled-coil filament, which has increased the efficiency by 20%. The article also notes the manufacture of the high pressure Mercury Discharge Lamp, originally in 400W, 250W and 150W wattages, and recently in 80W and 125W wattages. The latter lamps are made in quartz. All the glass bulbs are produced at the BTH glass works at Chesterfield.
Lighting: Lamps, Lighting: Manufacturers

Street Lighting Notes p65
Brief details of various installations.
Lighting: Installations

Illuminated Playground For Childen p67
Brief details of the children's playground in Bartholomew Square, London which has been equipped with 400W mercury discharge lamps moutned on double arm standards at a height of 25' and a spacing of 20'.
Lighting: Installations

Gas Illumination p67
A new device for ornamental gas lighting which is a novel type of gas mantle which may be used without protection from the weather. When first lighted the mantle shrinks rapidly into a small hemispherical source of light of great brilliancy. Straight or curved tubes fitted with these mantles can be made into letters or designs or used to outline architectural features. Their cost is low and their average life is over 100 hours.
Lighting: Lamps

Trade Note p67
Foster And Pullen, Ltd. following the precedent of the Jubilee in 1935, closed their works on Coronation Day, the workpeople being given a holiday on full pay.
Lighting: Manufacturers, Lighting: Events

Floodlighting the King's Palaces p67
Details of the floodlighting of Buckingham Palace (100 1000W GEC floodlights) and Windsor Castle.
Lighting: Installations, Lighting: Events

Royal Telegram p67
"The King and Queen are much gratified to receive your message of congratulations on the occasion of ther Majesties' Coronation. I am desired to express their warm thinks to all who joined in these good wishes." - Private Secretary

The Late Robert Beveridge p67
Obituary of Robert Beveridge, previous chief of the Public Lighting Department of Edinburgh and President of the Association in 1931-1932.
Lighting: Personnel

Bournemouth's New Street Lighting p68
Full details of a Siemens electrical installation in Bournemouth.
Lighting: Installations

Lighting Improvements In Bolton p68
Full details of a REVO electrical installation in Bolton.
Lighting: Installations

Adverts: British Commercial Gas Association, William Sugg And Co., Ltd., Walter Slingsby and Co., Ltd., Siemens Electric Lamps And Supplies Ltd., The British Thomson-Houston Co. Ltd., Gowshall Ltd., Gas Meter Company, Foster And Pullen Ltd., Bromford Tube Co., Ltd., The Horstmann Gear Co., Ltd., Concrete Utilities Co., Ltd., Radiovisor Parent Ltd., Public Works Road And Transport Exhibition And Congress, James Keith And Blackman Co., Ltd. and British Electrical Development Association, Inc.