DD IEC PAS 62717:2011 pdf – LED modules for general lighting – Performance requirements
DD IEC PAS 62717:2011 pdf – LED modules for general lighting – Performance requirements.
8.2.4 Peak intensity valu.
Where a peak intensity value is provided by the manufacturer or responsible vendor, the initial peak intensity of each individual LED module in the measured sample shall not be less than 75 % of the rated inten5ity.
Compliance is chocked according to Annex A.
Average valu, and confidenc, level are undet considerahon
8.2.5 Beam angle value
Where a beam angle value is provided by the manufacturer or responsible vendor, the beam angle value of each individual LED module in the measured sample shall not deviate by more than 25 % of the rated value.
Corn pliance Is checked according to Annex A.
Average value and confidence level are under consideratIon,
LED module efficacy shall be calculated from the measured initial luminous flux of the individual LED module divided by the measured initial input power of the same individual LED module.
Compliance Is checked as follows:
For all tested items in a sample, the LED module efficacy shall not be less than 90 % of the
rated LED module efficacy as declared by the manufacturer of responsible vendor,
9 Chromaticity co-ordinates, correlated colour temperature (CCT) and colour
9.1 Chromaticity co-ordinates
The initial chromaticity co-ordinates are measured. A second measurement of maintained chromaticity co-ordinates is made at an operational time as stated in 61. The measured actual chromaticity co-ordinate values (both initial and maintained) shall fit within one of 4 categories (see Table 5), which correspond to a particular MacAdams ellipse around the rated chromaticity co-ordinate value, whereby the size of the ellipse (expressed in n-steps) is a measure for the tolerance or deviation of an individual LED module
Corn pliance is checked as follows:
For compliance of family members, refer to 6.2.3.
For all of the tested items in a sample, the measured chromalicity co-ordinate values of a LED module (the initial value and ma,ntained value) shall not move beyond the chromaticity coordinate tolerance cate gory as Indicated by the manufacturer or responsible vendor (see Table 5). The measured values shall be of the same category as the rated values or better. The sample items for the chromaticity coordinate measurement shall be selected from four different batches.
The behaviour of the chromaticity co-ordinates of a LED module shall be expressed by statingthe two measurement results of both initial chromaticity co-ordinates and maintainedchromaticity co-ordinates.For an example, see Annex D.
NOTE 1 This PAS applies to LED modules for which it is in most cases possible to choose a CCT value that bestfulfils the requirement of a particular application. Standardised colour points are under consideration.
NOTE 2The tolerance areas are based on the ellipses defined by MacAdam，published in the Journal of theoptical Socilety of America，1943, as normally applied for fluorescent lamps and other discharge lamps.
NOTE3 See Annex A for measurement method of chromaticity co-ordinate values for LED modules.
*The colour variation between the ltems in a sample from different production runs resembles the varlation withinlonger periods of production.
9.2correlated colour temperature (ccT)
Preferred values to ensure interchangeability are under consideration. The four-digit CCTvalue is divided by 100 and the resuliting figure is rounded off to the next integer number,when using the photometric code in Annex D.
Compliance is checked as follows:
For compliance of family members,refer to 6.2.3.
For all of the tested items in a sample，the measured correlated colour temperature shall notmove beyond the values as declared by the manufacturer or responsible vendor.
9.3colour rendering index(CRI)
The initial colour rendering index (CRI) of a LED module is measured.A second measurementis made at an operational time as stated in 6.1.
Compliance is checked as folows:
For all tested items in a sample，the measured CRl values shall not have decreased by morethan
3 points from the rated CRI value (see Table 1) for initial CRl values, and- 5 points frorm the rated CRl value(see Table 1) for maintained CRI values.