Q: How much more fuel does the high-mass star have at the start of its life? The high-mass star has 10 times as much fuel. Q: What is the luminosity of the high-mass star? What is the luminosity of the low-mass star? The luminosity of the high-mass star is about 3000 times that of the low-mass star. Q: How much more energy does the high-mass star generate each second? The high-mass star must generate 3000 times as much energy as the low-mass star each second .... so it runs through its hydrogen about 3000 times faster.