| 摘要 |
<p>A control system 1 for controlling a street light or belisha beacon includes at least one photovoltaic power source 5; storage means 7 for storing energy from the photovoltaic power source; a light 9 configured to receive power from the photovoltaic power source and the storage means, wherein the light has an off mode and a plurality of on modes having different brightness levels; an ambient light detector 11 configured to monitor changes in the ambient light over a time interval and match the ambient light level to a light level which would be perceived by a human eye and at least one controller 3 configured to receive an input from the ambient light detector and in response to the received input control the brightness level of the light by controlling the mode of operation of the light.</p> |
