Scholarly record

SUSTAINABLE LIGHTING REFURBISHMENT SOLUTIONS: TECHNICAL UNIVERSITY OF CLUJ-NAPOCA

Calin Ciugudeanu

Abstract

Lighting Engineering Laboratory ? LEL - is the main lighting independent consultant around Transylvania (the north-west side of Romania). Over the past few years the Lighting Engineering Laboratory developed and implemented different trial energy efficient lighting solutions for the university buildings. The Building Services Faculty was used as a lighting test area. The starting point was in 2013 - the lighting refurbishment success of the greatest lecture hall by replacing the old 4*18 W fluorescent luminaires by new LED ones and a new DALI lighting control system, get 70% savings in lighting electricity consumption. For 2014 the hallways existing 2*36 W fluorescent luminaires were geared with electronic ballasts and motion sensors. In the same year the faculty outdoor lighting LED system controlled by daylight/time sensors was installed. In 2015 the classic fluorescent recessed 4*18 W fluorescent luminaires were retrofitted using 4*14.4 W LED modules. The overall luminous efficacy of the retrofitted luminaires was around 55 lm/W. In the last year a new emergency lighting system powered from a smart central battery unit was installed. In another class 2*36 W fluorescent lighting system was completely replaced with 37 W LEDs and a modern PLC dimmable control system able to maintain a certain user defined lighting level on the desk working area. The present paper tries to determine the pros and cons of each lighting refurbishment scenario in order to recommend the most appropriate validated solution.

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