UNCERTAINTY OF CORRELATED COLOR TEMPERATURE DUE TO VARIATION IN ELECTRICAL OPERATING CURRENT FOR NIS-TOTAL LUMINOUS FLUX WORKING STANDARD LAMPS

Manal A. Haridy

Abstract: In this research, correlated color temperature of nine NIS-working standard OSRAM lamps at different electrical current values has been measured at different electrical current variation. The lamps have been seasoned and calibrated since 1969. A set up based on NIS Spectroradiometer Ocean optics HR 2000 with uncertainty 4.7% and photometric bench have been used to measure the correlated color temperature for the lamps. The correlated color temperature equations are very useful to determine the uncertainty due to changing in electrical operating current for each lamp.

Keywords: Correlated color temperatures, Total Luminous Flux Working Standard Lamps, Electrical Current, Uncertainty.

DOI: https://doi.org/10.15623/ijret.2015.0408081