I have now compared the Diablo MK 4 and Megadrive w/ the Luxos, and they both put out more light, pretty much like I thought. Again, however, the Luxos puts out plenty, where the old Edelux didn't (at least for me). I went out for an hour ride last night at 10pm and loved it. I even flicked the "brights" on at a car I didn't think was going to stop at an intersection.