| 摘要 |
A power controller for controlling power delivery to a light, the power controller having a control unit in a weather proof casing responsive not only to remote power control signals, but also to be responsive to a remote stimulus with which the mode of operation of the power controller may be controlled. The power controller may include the casing, the control unit disposed within the casing, and a heat sink means disposed within the casing in a space between the control unit and parts of the casing, the heat sink means including a group of vane members each positioned in an array of vane members collectively surrounding at least a part of the control unit in which vane members are arranged to partially overlap other vane members (e.g. neighbouring vane of the array) in separated opposition thereto to define fluid ventilation ducts (e.g. for fluid inlet and/or outlet). |
