A delivery tube assembly for delivering a breathing gas to a patient, the delivery tube includes a first lumen having an upstream portion and a downstream portion. The data line assembly crosses over the gate line assembly while defining pixel regions. An estimated future lifecycle requirements planning value can be determined for the at least one material. The bottom of the device may also be adapted so as to allow attachment of the device to pliable articles such as fabric or clothing or to rigid articles such rails or platforms. Where desired, the entire coolant fluid stream is fluidly isolated from the working fluid stream. This creates a dramatic effect, particularly in dimly lit areas.