Resonant production of color octet electron at the LHeC

In composite models with colored preons leptogluons (l8) has a same status with leptoquarks, excited leptons and quarks, etc. We analyze resonant production of color octet electron (e8) at QCD Explorer stage of the Large Hadron electron Collider (LHeC). It is shown that the e8 discovery at the LHeC simultaneously will determine the compositeness scale.