Answer:
People use the lights to brighten and mask the dreariness of their lives.
Step-by-step explanation:
The first line of the poem says, "Men have tried hard to put away the dark;" Notice how it says "tried", the rest of this excerpt implies that this effort hasn't been entirely successful. Then check out the last line: "And not one wholly joyous, proud, or free." This line conveys the message that despite the bright lights that man has created to ward off darkness, their creations have failed to vanquish the darkness and dreariness from their lives