IEC PAS 62717:2011 pdf – LED modules for general lighting -Performance requirements.
8.2.4 Peak intensity value’
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 intensity.
Compliance is checked according to Annex A.
Average value and confidence level are undet considera1on
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.
Compliance is checked according to Annex A.
Average value and conhdence level are under conaideration
8.3 EffIcacy
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 LEO module efficacy as declared by the manufacturer of responsible vendor.
9 Chromaticity co-ordinates, correlated colour temperature (CCT) and colour rendering
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 staled in 6.1. 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.
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 chromat icily co-ordinate values of a LED module (the initial value and maintained value) shall not move beyond the chromaticity coordinate tolerance category 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 chromalicity coordinate measurement shall be selected from four different batches.
The behaviour of the chromaticity co-ordinates of a LED module shall be expressed by stating the two measurement results of both initial chrornaticity co-ordinates and maintained chromaticity co-ordinates. For an example, see Annex D.
NOTE 1 This PAS applies to LED modules for which it is in most cases posibl, to choose a CCT vakie that best tut? ha the requirement of a particular application. Standardised colour points are under cenalderahon.
NOTE 2 Th• tolerance areas are based on the ellipses defined by MacAdam. published in the Journal of the Optical Society of Amenca. 1943. as normally applied for fluorescent lamps and other discharge lamps.
NOTE 3 See Annex A for measurement method of chromalicily co-ordinate values for LED modules,
The colour vanalion between the Items In a sample from different production nina resembles the variation attrln lonper periods of production.
9.2 Correlated colour temperature (CCT)
Preferred values to ensure interchangeability are under consideration. The four-digit CCT value is divtded by 100 and the resulting figure is rounded oft 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 not move beyond the values as declared by the manufacturer or responsible vendor.
9.3 Colour renderIng index (CR1)
The initial colour rendering index (CR1) of a LED module is measured. A second measurement is made at an operational time as stated in 6.1.