Document ID: chunk:federal_register_of_legislation:F2023C00161:front:0:p6
Version: federal_register_of_legislation:F2023C00161
Segment Type: other
Provision Reference: 
Character Range: 15749–18732

scale accuracy).

       3.5. Position and dimensions of electrodes, arc and stripes

       3.5.1. The geometric position of the electrodes shall be as specified on the relevant data sheet. An example of a method of measuring arc and electrodes position is given in annex 5. Other methods may be used.

       3.5.1.1. The position and dimensions of the light source electrodes shall be measured before the ageing period, the gas-discharge light source unlit and using optical methods through the glass envelope.

       3.5.2. The shape and the displacement of the arc shall conform to the requirements as given on the relevant data sheet.

       3.5.2.1. The measurement shall be made after ageing with the light source supplied by the ballast at test voltage.

       3.5.3. The position and dimension and transmission of the stripes shall comply with the requirements as given on the relevant data sheet.

       3.5.3.1. The measurement shall be made after ageing with the light source supplied by the ballast at test voltage.

       3.6. Starting, run-up and hot-restrike characteristics

       3.6.1. Starting

       When tested according to the conditions specified in annex 4, the gas-discharge light source shall start directly and remain alight.

       3.6.2. Run-up

       When measured according to the conditions specified in annex 4, the gas-discharge light source shall emit at least:

       After 1 second: 25% of its objective luminous flux;

       After 4 seconds: 80% of its objective luminous flux.

       The objective luminous flux as indicated on the relevant data sheet.

       3.6.3. Hot-restrike

       When tested according to the conditions specified in annex 4, the gas-discharge light source shall restart directly after being switched-off for a period, as indicated on the data sheet.  After one second the light source shall emit at least 80% of its objective luminous flux.

       3.7. Electrical characteristics

       When measured according to the conditions specified in annex 4, the voltage and wattage of the light source shall be within the limits given on the relevant data sheet.

       3.8. Luminous flux

       When measured according to the conditions specified in annex 4, the luminous flux shall be within the limits given on the relevant data sheet.  In the case where white and yellow is specified for the same type, the objective value applied to light sources emitting white light, whereas the luminous flux of the light source emitting yellow light shall be at least 68% of the specified value.

       3.9. Colour

       3.9.1. The colour of the light emitted shall be white or yellow, as prescribed on the relevant data sheet.

       3.9.2. In case of white light, the calorimetric characteristics, expressed in CIE chromaticity coordinates, shall lie within the limits given on the relevant data sheet which are to be within the area formed by the following limits:

Towards blue    x > 0.310

Towards yellow