A chamber providing controlled amounts of IR and visible light within an internal space sized to seat at least one human being. The chamber includes at least one heater configured to emit FIR energy, at least one heater configured to emit NIR energy, and at least one heater configured to emit at least MIR energy. The chamber includes at least one light emitting source configured to emit a selected wavelength of visible light, and a control panel configured to control the amount and duration of FIR, MIR, NIR and visible light within the chamber.