Hello, I have to solve a question about figuring out the luminosity of a globular cluster using the given mass-luminosity relation L~M4 (where 4 is the power of M of course). But the problem here is that this relation does not apply to massive clusters but only to a certain mass limit. Would L~M would be the right relation in this case. So with respect to the suns luminosity (say l) and mass(m) we would have (we already know everything except L) L/l = M/m4 (as for sun l ~ m4) is this the right way to go? (I used this relation but still couldn't get the right answer) Thanks.