A recessed light fixture includes a thermally protected light emitting diode module. To this end, the optical transmission system is provided with a noise elimination unit corresponding to each of optical amplifiers arranged on a transmission path. The core of the invention is an operational transconductance amplifier having additional DC current sources allowing a common mode voltage shift. In disclosed embodiments, the Group IVB transition metal component is titanium, and the binder material is a combination of a hydrocarbon resin and a styrene block copolymer.