| 摘要 |
<p>A street light has a hollow standard having a lower end and an upper end. The standard is root mounted at its lower end and supports a lamp and a solar panel. An illumination circuit is mounted in the base compartment and connects a battery to the lamp for control of the lamp. A charging circuit connects the battery to the solar panel and to an electricity connection for charging. A control circuit inside the base compartment controls the brightness. The electricity connection extends from the root portion of the standard for connection of the light to an AC electricity supply. The charging circuit is programmed to connect the battery to the electricity supply at low electricity tariff times and to disconnect the battery from the mains before high electricity tariff times. The charging circuit is programmed to connect the battery to the solar panel for charging during daylight.</p> |
