| 摘要 |
A low-power illumination system for use with an associated barrier operator, or independently, comprises at least one illumination unit adapted to be operab le via mains power and a backup power supply, such as a battery. Accordingly, if mains power fails, a low-power light element maintained by the illumination unit may be responsively powered by the backup power supply to provide backup lighting. Alternatively, the barrier operator may be configured to detect a mains power failure, such that when such failu re is detected, an illumination command signal also needs sent to the at least one associate d illumination unit causing for it to be illuminated.
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