List of bands (20):

Liquid Tension Experiment
Liv Kristine
Liv Sin
Living Gate
Loathe
Lord Of Shadows
Lord Of The Lost
Lordi
Lost Society
Luxtorpeda
Lynyrd Skynyrd
Lyrre
Lysis
Łukasz Łyczkowski & 5 Rano
Machine Head
Maddie Rock Squad
Magnum
Majestica
Majesties
Malevolence