| 摘要 |
A lighting system 1 has a first lighting circuit 2 configured to provide a first predetermined level of lighting intensity. The first lighting circuit 2 is configured to receive power from a mains electricity supply 3 or from a battery source 4 if the mains supply is unavailable. The first lighting circuit 2 is connected to at least one first light source 5 and configured, when actuated, to provide lighting at the first predetermined level of lighting intensity. At this time, the first light source is in either an on or off state or a level of light required to raise ambient light level above a predetermined level. The system 1 further has a second lighting circuit 13 configured to provide lighting at at least a second predetermined level of lighting intensity. The second lighting circuit 13 is configured to receive power from the mains electricity supply 3 and is connected to at least one second light source 14. The second lighting circuit 13 has at least one sensor 18 with an input such that actuation thereof causes the second light source 14 to provide the second predetermined level of lighting intensity for a predetermined period of time, in response to ambient illumination meeting or exceeding a predetermined intensity, when said sensor has no input or has had no input for a predetermined period of time, or until re-set. In the system 1, the second predetermined level of lighting intensity is greater than said first predetermined level of lighting. |
