ECE R.7 Uniform provisions concerning the approval of front and rear positionlamps, stop-lamps and end-outline marker lamps for motor vehicles(except motor cycles) and their trailers

Whether the device produces steady luminous intensity (category R, R1,RM1, S1 or S3) or variable luminous intensity (category R2, RM2, S2 or
S4).”

In the case of devices of categories R2, RM2, S2 and S4 the time that elapses between energising the light source(s) and the light output measured on the reference axis to reach 90 per cent of the value measured in accordance with paragraph 6.3. above shall be measured for the extreme levels of luminous intensity produced by the device. The time measured to obtain the lowest luminous intensity shall not exceed the time measured to obtain the highest luminous intensity.”

In the case of devices of categories R2, RM2, S2 and S4 the time that elapses between energising the light source(s) and the light output measured on the reference axis to reach 90 per cent of the value measured in accordance with paragraph 6.3. above shall be measured for the extreme levels of luminous intensity produced by the device. The time measured to obtain the lowest luminous intensity shall not exceed the time measured to obtain the highest luminous intensity.’

The colour of the light emitted inside the field of the light distribution grid defined in paragraph 2 of Annex 4 shall be red or white. For testing see Annex 5 to this Regulation. Outside this field, no sharp variation of colour shall be observed.

These requirements shall also apply within the range of variable luminous intensity produced by:

(a) Rear position lamps of category R2;

(b) Rear end-outline marker lamps of category RM2;

(c) Stop lamps of categories S2 and S4.”

LISUN following instruments fully meet ECE R.7 Uniform provisions concerning the approval of front and rear positionlamps, stop-lamps and end-outline marker lamps for motor vehicles(except motor cycles) and their trailers:

LSG-1950 Goniophotometer for Automotive and Signal Lamps

LSG-1950S Goniophotometer for Traffic Signal Lamps