| 摘要 |
A lamp comprising: a light source, a cover configured to block the transmission of light from the light source, a cover interface portion configured to interface with the cover such that the cover is disposed for upward and downward movement with respect to the light source between a first position which is configured to fully block the transmission of light from the light source and at least one second position configured to allow light from the light source to illuminate an area around the lamp, the lamp comprising a track system operatively associated with the cover. The tracking system comprises at least one track and at least one tracking element, the track system configured for retaining the at least one tracking element for sliding movement along the at least one track to enable to be held at various heights. |
