Research of parameters of light emitting diode lamps and their suitability for lighting of working areas
Tallinn University of Technology, Ehitajate 5, EE19086 Tallinn, Estonia;e-mail: jana.paju@ttu.ee
Abstract:
The current paper describes the results obtained during several experiments inTallinn University and Tallinn University of Technology considering the parameters of lightemitting diode (LED) lamps. Four different LED lamps were investigated, all of them defined(by vendors and/or manufacturers) fitting to replace a 60 W incandescent lamp. The lampsinvestigated were the only ones fitting the definition and possible to purchase from vendors inTallinn, Estonia in the beginning of year 2012, when the experiments were carried out. Severalmethods were used to determine parameters such as: working temperature of luminaires,illuminance, working power, the spectrum of created light, the flicker produced. According tothe results of flickering, frequency and the modulation index of the flickering were calculated.The purpose of the research was to draw conclusions concerning the hypothesis, that byreplacing a 60 W incandescent lamp (IL) with a fitting LED lamp, the lamp that uses lesselectrical power is equivalent to the previously popular IL by the spectral properties as well asthe produced illuminance. Conclusions were also drawn considering the influence of such lighton people exposed to it. Key words: LED lamps, working temperature of luminaires, illuminance, working power ofluminaires, spectrum of light, flickering of light, occupational health, colour rendering index.
Key words:
colour rendering index, flickering of light, illuminance, LED lamps, occupational health., spectrum of light, working power of luminaires, working temperature of luminaires