I purchased my Sola dive light after a dive where me and my buddy bumped into another pair of divers underwater. They had Sola dive lights, and you could clearly see their lights underwater. Because it was a bright day, the sun washed out my weak light--I had to check and see if it was even on.
Around ten years later, and I'm on my second Sola dive light. It is my favorite piece of gear--the spotlight makes diving at night or in low-visibility conditions so much easier. I am convinced that it helps me spot tiny nudibranchs I wouldn't otherwise see. The flood setting is excellent for photography.
My first Sola dive light lasted almost ten years. When its seal eventually failed, customer service replaced the entire light at heftily reduced price, even though it was way out of warranty. I'm both impressed with both the light and happy with the customer service.