(type of star cooler than an M-type star)
An L-Type Star (L) is of the L-Class
(L Spectral Class), cooler than M-Type Stars,
radiating mainly in the Infrared.
They are generally dwarf stars (L Dwarf), i.e., not a Giant Star.
They have Metal hydride and alkalide metal Absorption Lines.
Some are considered Brown Dwarves, never burning Hydrogen.
(star type,spectral type)
Brown Dwarf (BD)