An illuminating device equipped with an integrated one-piece transparent shell is provided according to one embodiment of the invention. The illuminating device may be connected to a television, a computer monitor or an audio apparatus such that the illuminating device projects ambient light onto background walls or surroundings in order to improve the comfort and viewing experience. In one embodiment of the invention, an illuminating device used for ambient light comprises: a circuit unit comprising a plurality of light sources emitting light and a transceiver accepting display information; a shell coupled with said circuit unit; wherein a portion of said shell is transparent; wherein the shell comprises a diffusion portion and a reflection portion, and wherein a portion of said emitted light is reflected by said reflection portion and dispersed by said diffusion portion.