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At present time, in the operation of the outdoor electric power stations providers access their unattended operation. Linked to this there is necessary to know what is happening in the station not only during the day, but especially at night. Since the operation of the entire lighting system in normal operation is highly uneconomical and generates light pollution too, the solution is that in permanent...
This article represents a continuation of a longstanding research concerning behaviour prediction (consumption) of lighting systems collected on the constant level of illuminance depending on daylight. Due to the occurrences of differences between the prediction model and the actual long-standing lighting measurement in monitored lighting system it has been vitally important to seek the source of...
This reason to carry out this investigation was a complaint from international airport about increased maintenance cost and insufficient reliability of runway lighting systems. The exhaustive investigation of overall lighting installation was carried out, which comprises lighting parameters, mechanical parameters and electrical parameters. The possible causes of luminous flux drop and significantly...
Recently, more and more experts deals the issue of road lighting. They design methodologies that should be following in the design of public lighting. According to the latest norms is a way of designing road lighting more efficiently, contributing to safer operation and eliminates distracting light. The roads lighting is a specific case of lighting system where an observer stands in the area of rather...
When installing outdoor surveillance camera systems, a suitable choice and setting of outdoor lighting are important to ensure the right functioning of a camera and a legible and sharp picture. To these camera systems could transmit relevant visual information in the electric station is necessary correctly settings of illumination. The paper deals with the necessity to cooperate lighting system watchdog...
To verify a quality of dimmed lighting systems with illuminance regulation to constant level it was necessary to develop an automatic measuring system. This system works as a long-term measurement of illuminance of interior workplace (10 illuminance at the same time) together with the daylight measurement. This system measures horizontal illuminance at the workplace as it is required by norms. However,...
The article describes verifying of behaviour of dimming in a regulated lighting system in Smart Home (SH) which was controlled to the constant level of illuminance. The proposed method of measuring was realized as an upgrade for evaluation of curves of interior illuminance caused by daylight. A reference room in SH with a measuring device evaluating illuminance in the places of visual tasks and at...
Recently more and more specialists deal with questions of the road lighting. They design methodics that should be followed during the projection of the public lighting. The way of projection of road lighting according to the newest norms is more effective, it eliminates lighting pollution and helps to reach safer operation. The road lighting is a specific case of lighting system where an observer...
The reason to create this article was the need to make a methodology which would enable verifying not only lighting systems of public lighting but also measuring groups, which make these measurements. The methodology is suitable especially for administrators of big lighting systems of public lighting because it can verify for them qualitative and quantitative light-technical parameters of new lighting...
Pedestrian crossings are one of the most dangerous places on the road, so it is important to pay close attention to their design. At present, the greatest emphasis is mainly on the lighting, which is not always realized in accordance with applicable rules and regulations. On the lighting crossings are used different types of lamps with different types of light sources that are used to light problematic...
When installing outdoor surveillance camera systems, a suitable choice and setting of outdoor lighting are important to ensure the right functioning of a camera and a legible and sharp picture. Camera sensitivity is another important factor. It determines the minimal light conditions which are necessary for a camera chip to able to capture video. It is measured in the unit lux [lx]. Standard values...
A significant share of total electricity consumption at home is lighting, which can use up to 15% of total consumption. But it is possible to achieve significant savings if we choose the right light sources. Every room in the house or apartment has different requirements for light, and also different light sources have different light properties. Correct selection of sufficient and energy-saving lighting...
The confirmation of the prediction system model of economies in illumination systems with regulation for constant illuminance required the realization of a measuring device for long-term measuring of illuminance in interior workplaces. The suggested system makes this measuring possible in 10 points of interior and at the same time outdoor on the plain without shadows.
The aim of this paper was to compare the results measured using the UGR method of computer programs and practical implementation. The reason for this comparison is newly deployed LED luminaires. For LED luminaires may happen some applications to the user's subjective complaints of glare, although calculations for project documentation meet the conditions for glare reduction. The basic problem is a...
Today, except to boards that can be written with chalk or marker, used an interactive whiteboard. Interactive whiteboards are used in all types of schools, from elementary schools to universities. People perceive most of the information through the eye. The eye of is mainly perceived contrast. The aim of this study is to compare the photometric properties of interactive whiteboards and compare them...
The paper describes the basic rules for the construction of a pedestrian crossing and its lighting. It shows the issues that must be solved. It is mainly the location of a pedestrian crossing, the correct value of illuminance and luminance ratios in the area of a pedestrian crossing. It shows how the pedestrian himself can increase his safety when he is participating in traffic.
The world around us is changing faster than we can recognize. Some changes that are directly related to our lives are not even noticed, but some of them are very intensively perceived and we respond to them. If it is somewhere obtrusive light (light pollution), where is it fault? Is it caused by poorly designed lighting system, the current state of the weather or high content of dust particles and...
The paper deals with long-term measuring instruments for light data collected under the night sky. The point of such measurements is to quantify the obtrusive light and compare the level of the obtrusive light in populated industrial areas and out of them. For long-term measurements of low level illuminances (about 10-2 lx) and luminances (about 10-3 cd/m2) should be applied not only the measuring...
The obtrusive light is understood as luminance of the night sky as well as any light that glares or radiates into locations where its is not desired and causes so called light overlap. Moreover this sort of light increases the energy losses. In this study we consider the increase of luminance of sky which causes sky glow that cause worse observation of stars. This is an obstruction mainly for astronomers...
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