There are thus quick flashing lights (Qk.FI.), interrupted quick flashing lights (Int.Qk.FI.), and group interrupted quick flashing lights (Gp.l nt.Qk.FI.).
Ke kukho izibane ezidangela ngokukhawuleza (OK.F1) neqela eliphazanyiswa zizibane ezidangazela ngokukhawuleza (Gp.1nt.Qk.F1.).