Normalized luminous intensity Clause Samples
Normalized luminous intensity cumulative luminous flux
2.1. The luminous intensity measurements shall be started
(a) In case of an integrated heatsink after 30 minutes of operation; or
(b) In case of a Tb point, specified in the relevant data sheet, after stabilisation of the temperature at this Tb point.
2.2. Measurements have to be carried out at relevant test voltage.
Normalized luminous intensity. 2.1. The luminous intensity measurements shall be started after a) 30 minutes of stabilization time or
Normalized luminous intensity luminous intensity divided by the luminous flux of the light source in order to characterize the angular radiation pattern of the LED light source.