This work investigates the light illumination intensity, transmission performance, distribution on floor, and daylight factor of vertical hollow tubes at various incident elevation angles a source. The were made from commercial aluminum alloy sheets zinc to investigate internal illuminance for buildings reducing demand electrical energy artificial lighting. with constant length 0.5 m diameters ...

We are doing research and development of an intelligent lighting system. In the intelligent lighting system, the algorithm which controls lighting fixtures is important. In this research, we examine how to grasp the position relation between the lighting and the illuminance sensors with sufficient accuracy, and we propose a lighting control algorithm which estimates accurate position relation b...

Ambient illuminance and screen luminance have a significant influence on the visual fatigue performance associated with use of computers. The current study was conducted to investigate optimal under different ambient illuminances fit curve optimum LCD screens evening illumination. Thirty-three participants were assigned rate brightness, comfort luminance, satisfaction six levels (3.87, 21.47, 4...

The integrating sphere is used in photometry to h.measure total luminous flux. In a sphere with a diffusely reflecting coating, the illuminance by reflected > light is approximately the same at all points on the sphere surface and is proportional to the total flux emitted by the lamp. This reflected light is measured at a point on the sphere surface which is shielded from the direct rays of the...

The present study deals with the potential reduction of energy consumption for the lighting of shop window displays. Urban commerce has a very high impact on economics and at the same time, it is a highly energy-consuming sector. Light has the power of attracting people ́s attention, which is one of the goals of the trading and selling activity and very high illuminance levels are usually recomm...

In this seminar, you will learn: 1. An explanation of the photometric measurement process and its relation to the accuracy and reliability of photometric reports. 2. An in-depth understanding of photometric reports, including IESNA LM-63, CIBSE TM14, and EULUMDAT file formats. 3. A non-technical analysis of lighting design software algorithms, with particular emphasis on understanding how they ...