Uncertainty Estimation of Luminous Flux for LED Lamps Due to the Control of Electric Power

Electrical power efficiency has been of interest to both energy providers and consumers as it plays a pivotal role in our daily life. The voltage fluctuation is a significant issue with power quality since it has a substantial influence on electronic devices in addition to its economic impact. Several contributions have been dedicated to estimating the uncertainty in luminous flux including various parameters; however, most of them have been focused on traditional light sources such as incandescent lamps. One of the main parameters that have not been considered is the uncertainty in electric power due to voltage instabilities. In this study, the effect of regulating the electric power on the luminous flux and its combined uncertainty for different brands of LED lamps were explored. The LED lamps currently available in the Egyptian market have been tested according to their photometric and electric parameters. Three different brands labeled E, T, and V have been chosen with nominal power of 9 and 15 Watt. The experimental testing of such lamps showed that the power factors have a considerable effect on the combined uncertainty of the overall luminous flux.