減少使用不必要的室外照明 Reduce Abuse of Outdoor Lightings

原則是合理地運用照明:不要加設非必要的照明,和關掉非使用中的照明。但並不是叫大家將所有照明關掉、摸黑生活。大家離開房間時順手把燈關掉,也可以簡單地達到目標。再者,在深夜時關掉街上的霓虹廣告招牌,縮短高爾夫球場的泛光燈、郊野公園範圍內的街燈、青馬橋裝飾燈泡的照明時間等等,都是有關政府部門或機構可以考慮的方法。

The rule of thumb is using lighting reasonably: do not set up unnecessary lighting and turn off lights which are not in use. We are not implying that you should live in the dark, rather just turn off the light when you leave a room can simply achieve the target. Turning off the neon signboards on the streets at midnight, reducing the hours of floodlight on golf courses, road lights in country parks and decorative lights on Tsing Ma Bridge are all possible ways being considered by government and organizations.

在深夜時關掉室外照明有效嗎?有到過長洲觀星的人都知道,長洲最大的光害來源之一是在觀音灣後山運動場的強力射燈,而運動場會在晚上十一時關燈。一關燈光害明顯大幅減少,天上的星星好像突然湧出來,連銀河都見呢。又1996年百武彗星來訪時,日本環境廳曾呼籲國民進行「熄燈行動」,成功將夜空的光度降低一等半。

Turing off outdoor lightings at mid-night helps in reducing light pollution? If you have experience in star-grazing on Cheung Chau, you may noticed that by turning off the extensive lightings of the football court near Kwun Yam Beach, the strongest light pollution source among the island, at 11pm, many stars and even the Milky Way will emerge out immediately due to the dramatically reduction of light pollution. In 1996 during the brightened of comet Hyakutake, Ministry of the Environment of Government of Japan guided japanese to turn off the lights and so the night sky was 1.5 magnitude dimmer.