| 摘要 |
<p>A lighting appliance for use exterior to a building and which will be switched on automatically as a person enters a predetermined zone around the appliance, comprising a P.L. lamp (15) connected to a power supply (19) and switched by a volumetric detection device such as a P.I.R. detector (18). The appliance will operate efficiently in cold weather conditions and the tube will be started instantly under such conditions since it is equipped with a high voltage generator or electronic ballast (19) as opposed to an inductive ballast starter of the kind conventionally used with a fluorescent lamp tube.</p> |
