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L-type star

(L)
(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. Characteristics:

Purple-red - conventional color
1300-2000K - surface temperature

(star type,spectral type)
http://en.wikipedia.org/wiki/Stellar_classification
https://en.wikipedia.org/wiki/Brown_dwarf#Spectral_class_L

Referenced by:
brown dwarf (BD)
spectral class
ultracool dwarf

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