Use and Care Manual

Page 4 of 015 Report No.: BL17120001-1
Shenzhen Belling Efficiency Testing Lab
Tel:[phone] Fax:[phone] www.bellingtest.com
2 Test conducted and method
2.1 Ambient Condition
The ambient temperature in which measurements are being taken was maintained at 25°C ±1°C, the air
flow around the sample(s) being tested did not affect the performance.
2.2 Power Supply Characteristics
The AC power supply had a sinusoidal voltage wave shape at the prescribed frequency (60 Hz) such that
the RMS summation of the harmonic components does not exceed 3 percent of the fundamental during
operation of the test item.
The voltage of AC power supply (RMS voltage) applied to the device under test was regulated to
within±0.2 percent under load.
2.3 Seasoning and Stabilization
No seasoning was performed in accordance with IESNA LM-79-08. And before the measurement, the
sample was stabilized until the light output and power variations were less than 0.5% in 30 minutes
intervals (3 readings, 15 minutes apart).
2.4 Integrating Sphere System
The system includes AC power source, digital power meter, DC power supply, spectrophotometer, and
integrating sphere. The integrating sphere system is calibrated by standard light source before
measurement. The system and standard light source has been calibrated regularly and traceable to the
National Primary Standards. 4π geometry was used during measurement. The product was operated in its
intended orientation in application and was recorded in this report.
2.5 Goniophotometer System
The goniophotometer system is calibrated by standard light source before measurement. The standard light
source has been calibrated regularly and traceable to the National Primary Standards.
Type C goniophotometer was used for measuring total luminous flux, luminous intensity distribution, and
color spatial uniformity. The product was operated in its intended orientation in application and was
recorded in this report. The method according to IESNA LM-79-08 following chapter.