PX158 - I6b - mass-luminosity relationship

\begin{aligned} t & = \frac{E}{L} \\ E & \propto M \\ L & \propto M^{4} \\ ∴ t & \propto M^{- 3} \end{aligned}

for a star of mass, $10 M_{⊙} : t \approx 10 M y r$
for a star of mass, $1 M_{⊙} : t \approx 10 - 12 G y r$
for a star of mass, $0.1 M_{⊙} : t \approx 6000 G y r$