I will be requiring to have my arduino mega clone running constantly for approx 7-8 weeks, is there any risk of overheating or any other related problems of which I should be aware of?
Shouldn't be a problem, I've has an Arduino controlled 5x5x5 led cube running continously for a couple of months now. Just pay attention to your power source (run it well under rated capacity) and avoid any unusual ambient conditions.
Lefty