I had a chance to test this dive light in the cenotes of Yucatan Peninsula, Mexico. And in the salt water diving around Cancun and Isla Mujeres. The purpose of this dive light was to be used as a backup light in the: caves, shipwrecks and the night dives but I end up using it as a primary light since is very small and powerful. I also mounted on my camera rig as a focus light and for video. I was very happy with the performance, long lasting rechargible battery and strong design. Thank you OrcaTorch for a great product!