IEC TR 62778:2014
(Main)Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires
Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires
IEC/TR 62778:2014 brings clarification and guidance concerning the assessment of blue light hazard of all lighting products which have the main emission in the visible spectrum (380 nm to 780 nm). By optical and spectral calculations, it is shown what the photobiological safety measurements as described in IEC 62471 tell us about the product and, if this product is intended to be a component in a higher level lighting product, how this information can be transferred from the component product (e.g. the LED package, the LED module, or the lamp) to the higher level lighting product (e.g. the luminaire). This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: inclusion of the photobiological assessment of LED arrays (Annex D). The contents of the corrigendum of July 2014 have been included in this copy.
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IEC TR 62778
®
Edition 2.0 2014-06
TECHNICAL
REPORT
colour
inside
Application of IEC 62471 for the assessment of blue light hazard to light sources
and luminaires
IEC TR 62778:2014-05(en)
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IEC TR 62778
®
Edition 2.0 2014-06
TECHNICAL
REPORT
colour
inside
Application of IEC 62471 for the assessment of blue light hazard to light sources
and luminaires
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– 2 – IEC TR 62778:2014 © IEC 2014
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 11
5 Spectrum, colour temperature, and blue light hazard . 12
5.1 Calculation of blue light hazard quantities and photometric quantities from
emission spectra . 12
5.2 Luminance and illuminance regimes that give rise to t values below
max
100 s . 15
6 LED packages, LED modules, lamps and luminaires .
...
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