Irin wannan nau'in lantarki na graphite an yi shi ne da coke na man fetur.An ba da izinin ɗaukar nauyin halin yanzu ƙasa da 12~14A/㎡.Gabaɗaya ana amfani dashi a cikin tanderun wutar lantarki na yau da kullun don yin ƙarfe, yin silicon, yin phosphorus rawaya da sauransu.