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Test setup
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Two similar lighting installations installed in small single-person offices, each having a floor space of 16 m2, are compared and their energy consumption is determined for specified usage times. The ergonomic quality of the lighting solution improves as one moves from lower floors to higher floors. The most technically advanced solution was installed on the third floor: task area-related indirect/direct lighting controlled on the basis of daylight, with additional wallwasher downlights. In the morning and late afternoon, these illuminate the front walls in order to improve appearance, emotionality and visual comfort thanks to light with larger vertical components. A wallwasher with a relatively high colour temperature (6,500 K) installed on the rear wall lessens afternoon fatigue significantly.
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The results
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Measurements show that the installation on the third floor achieves a very high rating. Even though the installed power is very high, energy consumption remains within reasonable limits and achieves very good ergonomic quality. The most highly automated installation achieves the best balance. Daylight-based control and the deliberate switching on and off of lighting components cut energy consumption considerably and ergonomic quality remains within reasonable limits. Equipment with low installed power and poor ergonomic quality has a bad energy/ ergonomy ratio.
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Significance of VERU research project to Humanergy Balance concept
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The results of the VERU project make it possible to considerably refine and quantify the concept
of balance between lighting quality and lighting efficiency. VERU confirms the concept of not simply regarding light as a consumer of energy. Light creates the basis for ensuring that people feel at ease in rooms and can perform their work well and safely.
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