1. Lighting energy use

3. Lighting economics

4. Existing buildings

5. Lighting surveys & audits

• Energy 101: Light Bulbs (4:47) http://youtu.be/Pk60-D61h34
  
• What does lighting cost (4:30) https://youtu.be/wflEn2mWCcI
  
• Economics of Light (3:19) https://youtu.be/QzSAKWR_zv4
  
• Energy Performance Assessment of Lighting System - Design, Management and Auditing (10:02) https://youtu.be/ISmb5Ynsnxc

• HK EE Net: Lighting https://ee.emsd.gov.hk/english/lighting/light_intro/light_intro.html
  
• Energy Efficient Equipment - Lighting https://www.emsd.gov.hk/energyland/en/appAndEquip/equipment/lighting/
  
• Performance Assessment of Lighting Systems https://pdhonline.com/courses/e153/e153content.pdf

• SLL, 2012. The SLL Code for Lighting, Society of Light and Lighting (SLL), London. [HKALL]
• van Bommel W., 2019. Interior Lighting: Fundamentals, Technology and Application, Springer International Publishing, Cham. [HKALL]
• The Lighting Handbook (Zumtobel) http://www.zumtobel.com/PDB/teaser/EN/lichthandbuch.pdf
  
• Fetters J. L., 1998. The Handbook of Lighting Surveys and Audits, CRC Press, Boca Raton, Florida. [HKALL online][HKALL]

• Hong Kong Energy End-use Data 2021 https://www.emsd.gov.hk/en/energy_efficiency/energy_end_use_data_and_consumption_indicators/hong_kong_energy_end_use_data/
  
• LENI: Lighting Energy Numerical Indicator https://eeabs.co.uk/leni-lighting-energy-numerical-indicator/
  
• IEA Report Lighting https://www.iea.org/reports/lighting
  
• Types of LED Lights available for different Applications https://www.ledlightsinindia.com/information/types-of-led-lights-available-applications
  
• Quality and Performance Requirements for LED Lighting Products – Public Review Draft https://www.iea-4e.org/ssl/news/quality-and-performance-requirements-for-led-lighting-products-public-review-draft/
  
• Buildings Energy Efficiency Ordinance (BEEO) https://www.emsd.gov.hk/beeo/
  
• Energy Efficiency Labelling Scheme https://www.emsd.gov.hk/energylabel/
  
• Simple Economic Tool https://www.visual-3d.com/tools/payback/
  
• Visual Economic Tool https://www.visual-3d.com/tools/economicpro/
  
• Lumen maintenance - Wikipedia https://en.wikipedia.org/wiki/Lumen_maintenance
  
• How to Plan An LED Upgrade https://www.facilitiesnet.com/energyefficiency/article/How-to-Plan-An-LED-Upgrade--18504
  
• Lighting Retrofit Adviser https://task50.iea-shc.org/lighting-retrofit-adviser
  
• Electrical ballast - Wikipedia http://en.wikipedia.org/wiki/Electrical_ballast