Document ID: chunk:federal_register_of_legislation:F2025L00263:clause:2_5:p10
Version: federal_register_of_legislation:F2025L00263
Segment Type: clause
Provision Reference: sch 2 cl 5 (pt 10/11)
Character Range: 32281–35016

parts is minimised.
standby power or Psb means the electric power consumption of an LED lamp in standby mode.
Note: The standby power is expressed in watts (W).
stroboscopic effect:
 (a) means a change in motion perception induced by a light stimulus, the luminance or spectral distribution of which fluctuates with time, for a static observer in a non-static environment; and
 (b) is represented in this instrument by the metric 'SVM' (stroboscopic effect visibility measure), as defined in IEC TR 63158.
Note 1: The fluctuations can be periodic or non-periodic, and may be induced by the LED lamp itself, the power source or other influencing factors.
Note 2: SVM = 1 represents the visibility threshold (50% probability of detection) for an average observer.
survival factor or SF means the fraction of the total number of LED lamps that continue to operate at a given instant under defined conditions and switching frequency.
Note: The lamp survival factor has unit one.
SVM: see paragraph (b) of the definition of stroboscopic effect.
tested: a tested value or amount is one that is:
 (a) determined in accordance with a test conducted in accordance with the testing requirements of this instrument; or
 (b) calculated on the basis of values or amounts that have been determined in accordance with paragraph (a).
useful luminous flux or Φuse means the part of the luminous flux of an LED lamp that is considered when determining its energy efficiency, as follows:
 (a) for non-directional LED lamps—the total luminous flux emitted in a solid angle of 4π sr (corresponding to a 360° sphere), Φ360;
 (b) for directional LED lamps with beam angle ≥ 90° (except where paragraph (d) applies)—the luminous flux emitted in a solid angle of π sr (corresponding to a cone with angle of 120°), Φ120;
 (c) for directional LED lamps with beam angle < 90° (except where paragraph (d) applies)—the luminous flux emitted in a solid angle of 0.586π sr (corresponding to a cone with angle of 90°), Φ90;
 (d) for directional LED lamps where all forward-facing lumens are measured—the luminous flux emitted from the forward face of the lamp (corresponding to a cone with angle of 180°), Φ180.
Note: Where paragraph (d) applies, a different luminous efficacy factor will apply when calculating the minimum required luminous efficacy of the LED lamp, as specified in subsection 13(3).
 (2) Luminance or Lv means the density of luminous intensity with respect to the projected light-emitting surface area in a specified direction at a specified point on a real or imaginary surface, calculated as follows:
  where:
Iv is luminous intensity.
A is area.
α is the angle between the normal to the surface at the specified point and the specified direction.