| 摘要 |
A device for illuminating the area surrounding a door lock or other relatively small area includes in a preferred embodiment a housing that is mounted on the door or other surface adjacent the area to be illuminated, the housing having a translucent portion through which an electrically energized lamp emits light. The lamp is energized by a battery connected thereto by an electronic circuit having a time-delay sub-circuit for de-energizing the lamp at the expiration of a prescribed time period. The time-delay sub-circuit further includes a means for varying the period of time that the lamp is energized.
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