Good night! which put the candle out?
jealous zephyr
A zephyr is a gentle west wind. Calling it 'jealous' personifies death as something petty—not grand or terrible, just spiteful.
celestial wick
The candle becomes a cosmic object, its wick tended by angels. Dickinson scales a human life up to heavenly proportions.
importuned to see
To importune means to beg persistently. The sailor desperately needed this light—someone's life was someone else's navigation.
purer reveille
Reveille is the military wake-up call. 'Purer' suggests death as a better awakening than the drummer's earthly one—heaven's morning bugle.