TOLERANCES IN COMPUTER SIMULATIONS OF INDIRECT LIGHTING SYSTEMS

摘要

When conducting simulations for indirect lighting installations using different simulation software packages, substantial differences in obtained results were observed. We examine examples of simulation results obtained using two software packages most popular in Poland i.e. Dialux and Relux. Two indirect lighting installations were studied: one equipped with T5-type fluorescent lamps and another one equipped with LEDs. The obtained results indicate that computer-aided simulation of indirect lighting installations employing simulation software packages is certainly possible, but the utility of the obtained results is very limited. Critical differences were observed when comparing the results of calculated lighting parameters. In some cases, the Dialux software package calculated the average illuminance value to be almost twice as large as the value returned by the Relux package. Equally unacceptable differences were observed for calculated illuminance uniformity for the studied lighting installations.