The indoor environment provides unique surfaces and lighting conditions which affect the photochemistry taking place there. As indoor illumination sources typically output wavelengths too long to affect gas phase photochemistry, the potential for surface photochemistry induced by indoor light sources has been mostly unexplored. In this proof of concept study, we report the emission of gas phase nitrogen oxides as a product of the illumination of glass surfaces coated with nitrate-doped TiO2 and nitrate-deposited indoor paint, using a variety of common indoor light sources. Fluorescent, incandescent, halogen, and LED lights were studied, and a Xenon lamp was used for baseline measurements. NOx was emitted from all samples, thus establishing that renoxification can occur in indoor environments. NO2 (g) was the predominant species emitted from samples coated with nitrate-doped TiO2 and NO (g) was the predominant species emitted from nitrate-deposited painted glass surfaces. It was also found that heating from the light sources had no effect on the production of NOx. This preliminary study establishes the potential for heterogeneous photochemistry to occur on real indoor surfaces and opens the way for further research to be conducted under realistic indoor conditions.