Document ID: chunk:federal_register_of_legislation:F2023C00165:front:0:p7
Version: federal_register_of_legislation:F2023C00165
Segment Type: other
Provision Reference: 
Character Range: 18160–20957

the optical characteristics of a lighting device shall be referred;
3.1.7. Measuring luminous flux: specified value of the luminous flux for testing a filament lamp in the standard headlamp as specified in paragraph 3.8.;
3.1.8. Reference axis: an axis defined with reference to the cap and to which certain dimensions of the filament lamp are referred;
3.1.9. Reference plane: a plane defined with reference to the cap and to which certain dimensions of the filament lamp are referred.

3.2. General specifications

3.2.1. Each sample submitted shall conform to the relevant specifications of this Regulation.
3.2.2. Filament lamps shall be so designed as to be and to remain in good working order when in normal use. They shall moreover exhibit no fault in design or manufacture.

3.3. Manufacture

3.3.1. Filament lamp bulbs shall exhibit no scores or spots which might impair their efficiency and their optical performance.
3.3.2. Filament lamps shall be equipped with standard caps complying with the cap data sheets of IEC Publication 61, third edition, as specified on the individual lamp data sheets of annex 1.

3.3.3. The cap shall be strong and firmly secured to the bulb.

3.3.4. To ascertain whether filament lamps conform to the requirements of paragraphs 3.3.1. to 3.3.3. above, a visual inspection, a dimension check and, where necessary, a trial fitting shall be carried out.

3.4. Tests

3.4.1. Filament lamps shall first be aged at their test voltage for approximately one hour. For dual-filament lamps, each filament shall be aged separately.
3.4.2. In the case of a coloured bulb after the aging period corresponding to paragraph 3.4.1. the surface of the bulb shall be lightly wiped with a cotton cloth soaked in a mixture of 70vol.% of n-heptane and 30vol.% of toluol. After about five minutes, the surface shall be inspected visually. It must not show any apparent changes.
3.4.3. The position and dimensions of the filaments shall be measured with the filament lamps being supplied with current at from 90% to 100% of the test voltage.
3.4.4. Unless otherwise specified, electrical and photometric measurements shall be carried out at the test voltage.
3.4.5. Electrical measurements shall be carried out with instruments of at least class 0.2.
3.4.6. The luminous flux specified on the filament lamp data sheets of annex 1 is valid for filament lamps emitting white light, unless a special colour is stated there.
In the case where selective-yellow colour is allowed, the luminous flux of the filament lamp with selective-yellow outer bulb shall be at least 85% of the specified luminous flux of the relevant filament lamp with colourless bulb.

3.5. Filament position and dimensions

3.5.1. The geometric shapes of the filaments shall in principle be as specified on the