The phrase "a lamp to guide" is correct and usable in written English.
It can be used metaphorically to describe something that provides direction or clarity in a situation.
Example: "In times of uncertainty, her wisdom served as a lamp to guide us through the darkness."
Alternatives: "a beacon to lead" or "a light to direct".
Matthew speaks of a lamp giving light to "all those in the house"; Luke speaks of a lamp to guide "those coming into the house".
Now he has joined their company on the list of winners of the Pulitzer, the national award that the general reading public the world over perceives as major, a lamp to guide them to work that has added so much to the pages of The New Yorker in our time.
The moon is "[y]outhful and bright and bearing hope, and tranquil as can be", each of the stars is "a lamp to guide our way; a lamp for all to see" and the flag is "[c]rimson as the blood of all mankind, yet white and pure and free".
ONCE, we commemorated the dead, left out offerings to feed them and lamps to guide them home.
Conceived in the disturbing context of the European revolutions of 1848, the book lays down seven moral principles (or "Lamps") to guide architectural practice, one of which, "The Lamp of Memory," articulates the scrupulous respect for the original fabric of old buildings that would inspire William Morris and, through him, the conservation movement of the 20th century.
The Shuttle orbiters had no on-board lights, due to the difficulty of designing landing lights to survive re-entry, and so the runway was lit by high-intensity xenon arc lamps to guide the orbiter in.
Listen for guides, but use their wisdom as you would a lamp to read your own heart.
Pauline knocks a lamp to the floor.
And this is a perfectly good lamp by which to guide our actions in many cases.
At last, a hand to guide me!
Get a map to guide your journey.
