The Basics Of Electrical Light Sources. Measurements: To have some decent results I used 3 different types of meters: a Fluke 43B power analyses, a Lux meter and a Spectrum meter. These devices made it possible to know something about the electrical characteristics, the light intensity and the cause of different light colours. With these instruments it became possible to have a bright view on the different light sources and the characteristics, advantages and disadvantages. Simulation: Most of the measurements in these book are compared with a simulation with Dialux (a light calculation program) Conclusion: By reading this book you will certainly find out ;).