I am a commercial food service tech and as such work on commercial conveyor dish machines. These units will pump hundreds of gallons of 150*F+ corrosive chemical-laden water per hour. The entire reason I purchased my ZL SC62 was a review I read from a fellow Tech about how he had dropped his in one of these hellish machines while it was running and could not retrieve it for two hours. At the time of his review (a year and a half) after the great drop he was still using the same light and did not even have to replace the battery. I have as of yet not tested his review but I can attest to the ZL being far tougher than any of the other BIG NAME lights I had in the past. I am a ZL fan for life.