Hyloconis luki is a moth of the Gracillariidae family. It is found in the Democratic Republic of Congo. The habitat consists of primary rainforest with an undergrowth of Fabaceae. The length of the forewings is about 1.55 millimetres (0.061 in). The forewing ground colour is ochreous with white markings. The hindwings are grey, with the fringe slightly darker than the hindwing. Adults have been recorded on wing in late May.