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Technical survey and regulations
Headlamp Adjustment Survey
Tuesday, 25 November 2008

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Definitions and related interaction and philosophy of glare and visibility, Luminance, Illuminance and other technical terms are presented with discussion of relationships among seeing distance and glare.

The influence of vertical and lateral aiming on glare and visibility is examined in detail, considering various hypotheses on roads and measurement of glare and visibility.
Eight pilots illustrate the interaction of increasing glare and decreasing visibility.

Aiming regulations and practices in different countries like Germany, France, USA and Japan are described in detail. A synthesis on aiming operation result is presented with the five main points to be retained.

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Bulb Replacement Survey
Tuesday, 26 August 2008

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Numerous recent trends in the design and construction of vehicles and headlamps can tend to make headlight bulb replacement very difficult.
The range of bulb replacement ease or difficulty is larger than ever before. In some cases, the labour to replace the bulb is much more costly than the bulb itself.
The relative predominance of particular headlamp bulb types differs in Europe, Japan, and North America.
Some bulb types have mounting bases with built-in weather sealing, while others require separate external sealing provisions.

Four grades are proffered to assess the ease or difficulty of bulb replacement, and 70 new vehicles are ranked according to these criteria.
The results are analysed and discussed in the context of applicable regulations.
Only 20% of the car’ headlight bulbs can easily be replaced on the road at night.

The benchmark is presented with the 3 car makers that take in account the bulb replacement operation.

Specific tactics for improvement are suggested for automakers, lighting suppliers, and bulb makers.

Eighty images illustrate the practical issues with bulb replacement, and end users’ and garages’ comments are quoted.

 
Interior Lighting
Tuesday, 17 June 2008

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Executive summary

The market for interior lighting amounts to an estimated €310 million in Europe alone.

Until recently the market had been growing steadily at a rate of about 2% per year. The main players were a small group of lighting specialists as well as the traditional interior suppliers.

Now a significant change is taking place.

The main drivers for change are:

1. The light emitting diode, or LED, is becoming suitable for interior applications and,
2. Both scientific community and general public have become aware that ambient lighting is beneficial features for night time driving.


The change is bringing new contestants onto the field held so far by the traditional set of suppliers. New and hitherto unseen lighting features are being integrated into existing interior components.

The report on interior lighting provides facts and figures for the market. It details the innovations and shows the effects on the vehicle design. In a special section the report shows ‘How interior lighting works’.

 
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