Mine don't get appreciable light until the first sprout is visible.
Dr. Norman Deno has done extensive studies on many species of seeds, testing for germination in different temperature regimes, light or dark, dried or fresh seed. He tested all of these species and none required light to germinate.
Lilium albanicum
Lilium alexandrae
Lilium amabile
Lilium amabile luteum
Lilium auratum
Lilium canadense flavum
Lilium canadense v. editorum
Lilium candidum
Lilium catesbaei
Lilium caucasicum
Lilium centifolium (hybrids)
Lilium centifolium x henryi
Lilium cernuum
Lilium chalcedonicum
Lilium ciliatum
Lilium columbianum
Lilium concolor
Lilium concolor v. partheneion
Lilium davidi
Lilium debile
Lilium formosanum
Lilium grayi
Lilium humboldtii v. ocellatum
Lilium kelleyanum
Lilium martagon
Lilium martagon album
Lilium maximowiczii
Lilium michauxii
Lilium michiganense
Lilium monadelphum
Lilium nanum
Lilium nepalense
Lilium nobilissimum
Lilium occidentale
Lilium pardalinum
Lilium pardalinum v. wigginsii
Lilium parryi
Lilium parvum
Lilium philadelphicum
Lilium pomponium
Lilium ponticum
Lilium pulchellum
Lilium pumilum
Lilium pyrenaicum
Lilium regale
Lilium sachalinense
Lilium shastense
Lilium souliei
Lilium superbum
Lilium szovitsianum
Lilium tennuifolium
Lilium tsingtauense
Lilium washingtonianum