| 摘要 |
The present invention provides a method and apparatus (100) for adjusting a power factor of an electrical lighting load (L) comprising a power factor measurement unit (110) for measuring the power factor of an electrical lighting load (L) and a power factor adjustment unit (120) for adjusting the power factor of the electrical lighting load (L) in response to the power factor measurement. The present invention also provides an apparatus and method for controlling a street light comprising a photosensitive switching unit (130) arrangeable in use to switch on an electrical lighting load (L) in response to an ambient light level. <IMAGE> |
