Assessment of methods of marking LED sources with the power of equivalent light bulb

Tabaka, P.; Rózga, Paweł

doi:10.1515/bpasts-2017-0095

Cited by 17 publications

(14 citation statements)

References 11 publications

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“…The basic method of presenting the distribution of light by the luminaire is the photometric solid [10,21,36]. It is a set of spatially distributed vectors of luminous intensity originating in the light center of the luminaire.…”

Section: The Results Of the Laboratory Measurementsmentioning

confidence: 99%

“…As a result of one of the priority actions of the European Union (EU), authorities are obligated to reduce electricity consumption, and an important branch of electricity, where this aspect is considered, is electric lighting. The effect of the actions made by the EU is a process of withdrawing energy-consuming light sources and promoting the introduction of modern light sources like light-emitting diodes (LEDs) [4,21,22]. For this reason, LED sources are also considered as the light sources possible to be installed in the opal sphere type luminaries.…”

Section: Introductionmentioning

confidence: 99%

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Influence of a Light Source Installed in a Luminaire of Opal Sphere Type on the Effect of Light Pollution

Tabaka

Rózga

2020

Energies

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The article presents the results of the studies concerning the influence of a light source installed in luminaire of opal sphere type on the light pollution effect of the night sky. It is known from literature reports that the effect of light pollution is influenced by the spectral distribution of light. Although the influence of the spectral distribution has been widely studied from different perspectives, there is still a need to study this phenomenon—for example, from the point of view of the spectral reflection properties of the ground, on which the lanterns are installed. Hence, the above-mentioned aspect was considered in the authors’ investigations. The luminaire considered has been equipped with 20 different light sources, including the latest generation of lamps (light-emitting diodes, LEDs) as well as the conventional ones. With respect to these light sources, the measurements of light distribution and spectral distribution of emitted radiation of the luminaire were performed. Having these measurement data, the simulations were carried out using the DIALux software, and the calculations were made using the specially prepared calculation tool. On the basis of the results obtained in this way this was stated that the type of light source installed in the luminaire has a significant effect on the sky glow. An important factor affecting light pollution is not only the value of the luminous flux emitted upward but also the spectral characteristics of the emitted radiation, the impact of which is most noticeable. The conclusions from the studies indicate the next steps in the analysis of the light pollution effect. These steps will be focused on extended analysis of LEDs as modern and developed light sources.

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Section: The Results Of the Laboratory Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of a Light Source Installed in a Luminaire of Opal Sphere Type on the Effect of Light Pollution

Tabaka

Rózga

2020

Energies

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“…Registration of selected quantities with regard to the light sources and the luminaires was done after one hour from the moment of the voltage being supplied. According to the information provided in [63], this time is sufficient to conclude that the individual parameters of the lamps are stabilized. The integrating sphere was used to determine the spectral characteristics while the electrical parameters were recorded with the use of an Norma 4000 power analyzer produced by FLUKE.…”

Section: Scope and Methodology Of The Studiesmentioning

confidence: 99%

Influence of Replacement of Sodium Lamps in Park Luminaires with LED Sources of Different Closest Color Temperature on the Effect of Light Pollution and Energy Efficiency

Tabaka

2021

Energies

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According to the European Union (EU) regulations, EU members are obligated, among others, to improve the energy efficiency in the outdoor lighting sector. One of the ways to consider this fact is to install LED sources in luminaires. Due to the reasonable lighting requirements for the lighting of squares and parks, the cheapest way to modernize lighting is to replace conventional discharge lamps with LED sources in park luminaires. Using nine typical park luminaires, the influence of replacing classic sodium lamps with LED sources on the effect of light pollution and energy efficiency was analyzed. Using data, such as a photometric solid and a relative spectral distribution, simulation calculations were carried out in DIALux software and our own calculation tool to consider this issue. The studies considered 156 LED sources of different spectral distributions and a wide range of color temperatures from 1000 K to 9753 K as well as different color rendering index (CRI) values. The conducted studies showed that the replacement of sodium lamps with LED sources is not necessarily associated with an increased negative impact on the effect of light pollution. It was also found also that the CRI value has an influence on the degree of light pollution.

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“…Manufactures blow their own trumpets with the sophisticated designs and control systems dedicated to their products, the ever bigger luminous efficacy of LED sources, the unique reduction in energy losses, and the overestimated forecast of many cost savings [9,10]. Nevertheless, the mere fact of using LED technology does not always guarantee 2 of 19 the best possible solution [11,12]. It is true that there are many advantages to LEDs, but there are also many disadvantages or unsolved problems, such as heat dissipation, blue light hazard, life time, and the adverse effect on the electrical power system (the generation of harmonics) [13].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Criteria Assessment Procedure for Outdoor Lighting at the Design Stage

Pracki

Skarżyński

2020

Sustainability

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This paper presents an attempt at a unified approach for the assessment of outdoor lighting solutions at the design stage. First of all, the lighting criteria for different types of outdoor lighting installations have been carefully described. Despite the differences in criteria, it is possible to find a common ground for the assessment of lighting solutions at the design stage. This is based on the need for the assessment of lighting solutions to be included in the requirements for the luminous environment, light pollution, and energy efficiency. The review and analysis of the standards and reports allows an experimental procedure to be created, the main aim of which is to find the best and most sustainable lighting solution for any outdoor situation. The procedure was tested by the example of an analysis of parking lot lighting solutions. In the case analyzed, 120 solutions were considered. It appeared that, in only 65 cases were the requirements referring to both lighting condition and light pollution met. Finally, based on the lighting energy efficiency assessment, ten solutions were selected as the most suitable. Furthermore, only one solution out of the ten was the most beneficial, taking into account the extra criterion of basic economic cost. The case study confirms that the assessment procedure allows the most beneficial solution to be selected, taking into account the luminous environment, as well as light pollution and energy efficiency criteria. The proposed multi-criteria assessment procedure may be used as a valuable tool by lighting designers to select the most beneficial solution in order to meet the needs of safety, visual efficiency, and comfort, as well as taking into account light pollution and energy efficiency restrictions.

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Assessment of methods of marking LED sources with the power of equivalent light bulb

Cited by 17 publications

References 11 publications

Influence of a Light Source Installed in a Luminaire of Opal Sphere Type on the Effect of Light Pollution

Influence of a Light Source Installed in a Luminaire of Opal Sphere Type on the Effect of Light Pollution

Influence of Replacement of Sodium Lamps in Park Luminaires with LED Sources of Different Closest Color Temperature on the Effect of Light Pollution and Energy Efficiency

A Multi-Criteria Assessment Procedure for Outdoor Lighting at the Design Stage

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