UL safety cortication and energy regulations make it difficult to add UV and IR, UV because it can easily damage people's eyes and IR because it introduces too much heat which can be a fire or touch/burn risk. Energy regulations also limit how much wattage you can put into lighting, if most of that energy goes into creating IR (like real sunlight) then you won't comply with those regulations. For now it's better to buy a separate space heater to create IR, then you could also use a cheaper energy source like gas.