Gentle lighting is best as many chemically sensitive people are also light sensitive. Do price compare different sources as they do vary. AFM has a complete line of building and maintenance products which are pretty safe for the chemically sensitive person. Avoid wall paper because of the glues. Any woods should be free of turpines, such as poplar.
Redwood seems to be ok.
Avoid cedar or pine. Metal blinds are probably best. Avoid synthetic materials and insulated materials.