Geometrized luminosity
= Geometrized luminosity
{title2=$L_{\rm geom}=GL_{\rm SI}/c^5$}
A <geometrized luminosity> is dimensionless because in <geometrized units> an energy and a time have the same dimension. Starting from SI <luminosity>, multiply by $G/c^5$. The corresponding SI power unit is $c^5/G$. Radiating a fraction $f$ of a mass $M$ at constant SI <luminosity> $L$ takes $fMc^2/L$, or $f(GM/c^3)/L_{\rm geom}$ in seconds.