A foldable lamp shade includes an upper support hoop, a lower support hoop, a cover mounted between the upper support hoop and the lower support hoop, and a plurality of support bars detachably mounted between the upper support hoop and the lower support hoop for supporting and stretching the cover. Preferably the operation of the system is controlled by a programmable timer to operate when the user is resting or asleep. In another embodiment, the reaction chamber andor filtrationseparation media include non-catalytic or catalytic metals to simultaneously or separately induce on-substrate synthesis and growth of carbon nanomaterials.