I bought 2 of them solely based on the fact that the specs said it had a depth rating of 150m and it had a triple o-ring. Befor I was using the big blue backup lights that everyone has but was always nervous to take it below 120m (depth rating is 100m) but the Big Blue lights still function at those depths. So the Orcatorch on paper looked great and its the only light in its class with 150m depth rating. But sadly both have sticky buttons around 40m-45m and deeper making them useless to me. The button is just sucked in flat nothing you can do with it. I have tried turning them on in the shallows and just leaving them on but at about 80m they do a strange on/off thing and then aprox. 120m they completely shut off, I am assuming the constant pressure on the button puts it into some kind of forced off mode??
But if your just using these for recreation putting around they are a great light and you will not be disappointed but for me it was a little bit of false advertising that they are 150m depth rated. Yes the light will not flood but it is not functional below 45m and I bought they because they had a 150m rating.