Abstract: A light belt apparatus has a base belt, a flexible circuit board, LED modules and an input terminal. The base belt is made of plastic material and has an elongated flexible body. The elongated flexible body has an elongated groove with a first side and a second side. The first side and the second side is opposite to each other. The flexible circuit board is attached to the first side of the base belt. The LED modules emits an emitted light to the second side of the base belt, the second side of the base belt having a reflective curve surface reflecting the emitted light to exit the groove. The input terminal supplies electricity to the flexible circuit board.