According to Osho, the ‘lamp of the Name’ is the inner light kindled by remembrance of the divine Name—pure awareness turned inward. When the wick (your attention) is set aright, this lamp dispels the inner darkness, revealing life beyond birth and death. The ‘palace’ is you; uncover the golden coverings of ego and conditioning, and your whole being fills with light.
It’s the inner light that switches on when you remember the divine within and focus your attention rightly.