Would it sound awkward if I say "fire" instead of "light" in this context?

Native speaker’s answer
Rebecca
It might sound awkward, yes! That's because a lot of the song is metaphorical, too. So here, "light" refers not only to a flame of light but also to the good things in life and positive feelings. When those things are gone or fading away, you realize you need more of them. But, also, a "flame" may be more appropriate than "fire" practically. Since a "fire" is usually quite big, but if you have something like a "gas lamp" or a "candle," it would just be a "flame." Ex: She was like a light in my life, showing me how to live again. Ex: The flame ran out on the gas lamp.