They were huge at one point. They were LED Lenser/Coast at one point in the US but those two went their separate ways.
My last "Lenser" was a P7 (in about 2015) that had an interface I liked. Click on and hold for turbo, release for high, click again (reverse) for low. If you waited two seconds and click again it turned off from high or low.
My first LED was a LED Lenser with a whopping 12 lumens. It was 3 LED's at 4 lumens each running off of 3 N size cells.