question about font size

[Haipeng Hu]

Hello,
  I'm preparing two orchestral works for a competition. The music is
ok, but I have problem with title page because I can't see the actual
words. Could anyone tell me how Lilypond deal with absolute fontsize
(\abs-fontsize)? Is the value for pt or px? In Microsoft Word, it
deals with pt. So if Lilypond is using pt, I can learn the title page
documents given by our music publisher. Thank you in advance!

Regards
Haipeng