Apparatuses, systems, and methods are disclosed for caching data. The invention also provides S enantiomeric forms of such compounds which possess the ability to inhibit cell growth whilst being of low toxicity to such cells and methods of making such compounds. It has been found that the use of such a zinc oxide inclusive layer results in improved thermal stability upon heat treatment, more neutral andor desirable coloration, lower sheet resistance, andor lower emissivity. The first non-translucent coating and the second non-translucent coating cause internal reflection within the at least one wall except for the outer openings and the outer peripheral edge through which light from the at least one light source is able to pass.