Anyone who has woken in the middle of the night will recognize the scene here. The room is dark, and the only thing glowing is the face of a clock. The speaker notices that this small light seems to build something: "a new room," grown out of the glow.
The word "grown" is the key. The room isn't switched on or revealed, it grows, slowly, like a plant or a crystal. The dim light turns the familiar bedroom into a different, smaller space, with its own edges and shadows. It's the same place, yet it feels changed.
The speaker doesn't say how they feel, but the tone is quiet and a little wondering. There's a hint of loneliness in being awake while everything else sleeps, and a hint of comfort in the faint light. Because the light comes from a clock, time is also present, ticking through the dark. The mood is hushed, strange and gentle, as if the night has been given a tiny, private world to live in.