Often IllumiTile Light Engines are convection cooled, but in circumstances where temperatures may rise above 45C, the array is more than 15 in quantity or the IllumiTile Light Engine array is partially encapsulated (with input/output vents), cooling fans may be necessary. Cooling fans should be placed so that a forced path across the IllumiTile Light Engines arrays occurs, and heated air is exhausted from the enclosure so as to maintain approximately 25C in the array environment.