The department also took the initiative to switch off four of the 9 light bulbs installed in each of our 10 lift cars inside our zone in immigration tower to save electricity . immigration tower saw a reduction in electricity consumption by 0 . 45 per cent in 20022003 compared with that in 20012002 此外，在入境事务大楼本处范围内有十部升降机机厢，每部均设有九个灯泡，本处亦主动关掉每部升降机内的其中四个灯泡，以节约用电。
