Document ID: chunk:federal_register_of_legislation:F2023C00154:front:0:p37
Version: federal_register_of_legislation:F2023C00154
Segment Type: other
Provision Reference: 
Character Range: 94867–97586

Results
There shall be no appreciable impairment of the grated area. Impairments at the intersections between squares or at the edges of the cuts shall be permitted, provided that the impaired area does not exceed 15 per cent of the grated surface.
2.6. Tests of the complete lamp incorporating a lens of plastic material
2.6.1. Resistance to mechanical deterioration of the lens surface
2.6.1.1. Tests
The lens of lamp sample No. 1 shall be subjected to the test described in paragraph 2.4.1.
2.6.1.2. Results
 After the test, the results of photometric measurements prescribed in zone B for Class B front fog lamp and lines 2 and 5 for Class F3 front fog lamp shall not exceed the maximum values prescribed by more than 30 per cent.
2.6.2. Test of adherence of coatings, if any
The lens of lamp sample No. 2 shall be subjected to the test described in paragraph 2.5. above.
2.7. Resistance to light source radiation
2.7.1. In the case of gas-discharge light sources: for testing the resistance of light transmitting components made of plastic materials against UV radiation inside the front fog lamp:
2.7.1.1. Flat samples of each light transmitting plastic component of the front fog lamps are exposed to the light of the gas-discharge light source. The parameters such as angles and distances of these samples shall be the same as in the front fog lamp.
2.7.1.2. After 1,500 hours of continuous exposure, the colorimetric specifications of the transmitted light must be met with a new standard gas-discharge light source, and the surface of the samples shall be free of cracks, scratches, scaling or deformation.
3. Verification of the conformity of production
3.1. With regard to the materials used for the manufacture of lenses, the lamps of a series shall be recognized as complying with this Regulation if:
3.1.1. After the test for resistance to chemical agents and the test for resistance to detergents and hydrocarbons, the outer face of the samples exhibits no cracks, chipping or deformation visible to the naked eye (see paragraphs 2.2.2., 2.3.1. and 2.3.2. above);
3.1.2. After the test described in paragraph 2.6.1.1. above, the photometric values at the points of measurement considered in paragraph 2.6.1.2. above are within the limits prescribed for conformity of production by this Regulation.
3.2. If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of front fog lamps selected at random.
Annex 6 - Appendix 1

Chronological order of approval tests
A. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 2.2.2. of this Regulation).

Tests   Samples                            Lenses or samples of material  Lenses