Meteors are very small. The bright light comes mostly from the molecules of atmosphere in front of the meteor being compressed, heated, and ionized[0] - essentially from the friction of the high-speed meteor entering the atmosphere.
I guess if the meteor was a ball of pure magnesium, it might glow brighter, but there isn't so much oxygen up at that height, so my no-calc-gut-feel estimate is that this would contribute orders of magnitude less brightness than the glowing atmospheric molecules.
I guess if the meteor was a ball of pure magnesium, it might glow brighter, but there isn't so much oxygen up at that height, so my no-calc-gut-feel estimate is that this would contribute orders of magnitude less brightness than the glowing atmospheric molecules.
[0] https://www.amsmeteors.org/meteor-showers/meteor-faq/#3