http://en.wikipedia.org/wiki/Image:B...nelli_2005.jpg
I was trying to find out the average neutrino flux from our Sun so a rough value of the energy it could provide a white dwarf star with could be worked out (assuming 100% efficiency, which is a bit rich but hey, 'tis a start), but that's the best I could find. It's a graph of neutrino flux against energy for our sun (predicted from the standard model, not experimental data though).