Published in the “Association of Electrical Contractors 16th Anniversary Edition” (April 2010).

Published in the “Today's Mechanical & Electrical – Building Services & Environmental Protection Issue No. 19” (August 2010).

Published in the “Today's Mechanical & Electrical – Building Services & Environmental Protection Issue No. 23” (November 2011) by The Federation of Hong Kong Electrical & Mechanical Industries Trade Unions 10th Anniversary Edition.

Automatic Dimming LED Lamp and BEEO Regulation