An electrochromic device comprising: a first glass element having an electrically conductive material associated therewith, wherein said first element comprises a height (h1), a width (w1), a thickness (t1), an inner surface, and an outer surface; a second element having an electrically conductive material associated therewith, wherein said second element comprises a height (h2), a width (w2) , and a thickness (t2), an inner surface, and an outer surface; a cell spacing (c) which comprises a distance between said inner surface of said first element and said inner surface of said second element; a gelled electrochromic medium contained within a chamber positioned between said first and second elements; wherein (h1), (w1), (t1), (h2), (w2), (t2), and (c) are numerical values in millimeters; and wherein (h1), (w1), and (t1) of said first element, and (h2), (w2), and (t2) of said second element and (c) comprise numerical values such that the following inequality is satisfied: 2 ⁢ h 1 5 ⁢ ( 1 - ⅇ - 2 ( h 1 / w 1 ) 2 ) t 1 3 ⁢ ( 7.57 × 10 12 ) + 2 ⁢ h 2 5 ⁢ ( 1 - ⅇ - 2 ( h 2 / w 2 ) 2 ) t 2 3 ⁢ ( 7.57 × 10 12 ) ≥ .1 ⁢ ( c ) .