My home was located on a small strip of land between a big river and the adjacent canal. In late 2021, a record high level of flooding occurred resulting in a water level that reached between 8 and 9ft high on the ground story of the home. Unfortunately, this light (along with what it was mounted to) was left on the ground floor. 4 days later when I was finally able to go back, it was a MESS. This wasn't pool water, there was muck on everything and in everything. To my surprise, the first moment I turned the TLR-1 on, it shined at full brightness, and to this day, it is still perfect.Due to that, I have decided to purchase another one (for a new item that these mount to).The level of brightness in this package size is unrivaled and in the process of purchasing one you are supporting a local Pennsylvania business.The multiple included rail keys cover 95% of the options you would ever want to mount it to and the two-sided activation switches make it perfect for any ambi use.Super easy to operate, bright as heck, extremely long battery life, and mine survived a literal flood- so that's a win in my book. All for a reasonable price.