Task 50
Task 50
SHC Task 50

Advanced Lighting for Retrofitting Buildings

4th Industry Workshop

Monday, 29 September 2014, 9.00-12:30 (lunch 12:30-13:30)

IEA SHC Task 50

Lighting accounts for approx. 19% (~3000 TWh) of the global electric energy consumption. Without essential changes in policies, markets and practical implementations it is expected to continuously grow despite significant and rapid technical improvements like solid-state lighting, new façade and light management techniques.

With a small volume of new buildings, major lighting energy savings can only be realized by retrofitting the existing building stock. Many countries face the same situation: About 75 % of the lighting installations are considered to be out of date (older than 25 years). Compared to existing installations, the majority of new solutions allow a significant increase in efficiency – easily by a factor of three or more – going along with highly interesting payback times. However, lighting refurbishments are still lagging behind compared to what is economically and technically possible and feasible.

Task 50 targets building owners (investors), authorities, industry and consultants by providing strategic, technical and economic information and by supporting stakeholders overcome barriers in retrofitting lighting installations. The overall objective of this Task is thus to accelerate retrofitting of daylighting and electric lighting solutions in the non-domestic sector using cost-effective, best practice approaches, which can be used on a wide range of typical existing buildings.

The scope of Task 50 is on general lighting systems for indoor environments. The focus is on lighting appliances in non-domestic buildings. Technically, Task 50 addresses daylight utilization through better façade/roof technologies and architectural solutions, electric lighting schemes as well as lighting control systems and strategies.

Objectives of the workshop

  • Task experts will inform about general lighting retrofit issues and possible solutions
  • General experience exchange between industry and research
  • Obtain feedback from industry and learn about practitioners’ needs, for successful continuation of the work within IEA SHC Task 50


Welcome and coffee

Advanced lighting solutions for retrofitting buildings: Introducing IEA SHC Task 50
Jan de Boer, Fraunhofer IBP, Germany

Japanese government policies and standards for building energy efficiency
Yasuhiro Miki, Building Research Institute, Japan

Lighting retrofit in current practice – Evaluation of an international survey within IEA Task 50
Bernard Paule, ESTIA, Switzerland

Lighting retrofit in office buildings for higher lighting quality and energy efficiency
Mika Katsuta, Kyudenko Corporation, Japan

Challenges and traps of assessing life cycle costs of lighting – Retrofitting at the right time
Marc Fontoynont, Danish Building Research Institute (SBI), Denmark

Coffee break

Searching for adequate retrofit solutions - How to rate and compare lighting technologies
Martine Knoop, TU-Berlin, Germany

Sun control and façade design – An architect’s perspective
Kazuo Chikushi, Tsuzuki and Chikushi, architects, Japan

Application of research findings to a lighting retrofit project - The project process with stakeholders and evaluation
Miki Kozaki, Building Research Institute, Japan

(Day)lighting retrofit in progress at NTNU-campus in Trondheim, Norway
Fredrik Martens Onarheim, Norwegian University of Science and Technology (NTNU), Norway


Workshop – Topic

Retrofitting of lighting solutions in non-residential buildings


Centennial Hall
Kyushu University School of Medicine
3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan


Participation fee: EUR40 (JPY5500) including lunch and coffee (no extra fee for Task 50 meeting participants)

Mandatory Registration

The registration is open until 14 September 2014
Limitation of participants: 70
Cancellation policy: Fees will be returned to the participant if cancellation is made before 19 September 2014. For later cancellations, the full fees will be charged to the participant.


Additional information on Task 50 and the workshop can be found under: http://task50.iea-shc.org/. The access route to Centennial Hall Kyushu University School of Medicine can be found here:


Yasuko Koga
Faculty of Human-Environment Studies, Kyushu University
6-10-1 Hakozaki, Higashi-ku
Fukuoka 812-8581, Japan
Supported by the Illuminating Engineering Institute of Japan, Kyushu Branch.