To download a specific IES light data/profile for a client, please visit the following websites: Numerous manufactures provide IES light profiles (IES files) to help sell/depict their exquisite and complex light fixtures/designs, while making 3d scenes more realistic and appealing. The Illuminating Engineering Society (IES) has defined the distribution of a Light source as an IES.Īn IES file(Emitter) helps users define/depict the distribution of a real complex light fixture digitally.