The Environment Bureau launched the Charter on External Lighting in 2016 to invite owners and responsible persons of external lighting installations to pledge to switch off their decorative, promotional or advertising lighting installations that affect the outdoor environment. About 5,000 participants from different sectors have signed the Charter to indicate their support. The Working Group on External Lighting is now conducting a review on the effectiveness of the Charter. Public engagement forums were scheduled and an online survey was conducted to gauge the public's views on measures to manage external lighting and their future developments. Information about this review exercise can be read from its dedicated website.