| 摘要 |
A lighting unit (10) for providing emergency or back-up lighting, comprising a light source (12), and a power source (14). The unit (10) is mountable in a light bulb socket or the like to provide a replacement for a conventional light bulb. The unit (10) functions to provide light in similar manner to a conventional light bulb when the usual, mains electricity supply is provided to the socket. However, upon failure of the electricity supply to the unit (10) means within the unit enables the power source (14) of the unit to power the light source (12) whereby the unit (10) provides light, for instance as part of an emergency or back-up lighting system. |
