I’ve been back-to-backing an Edelux II, B&M IQ-X and a Supernova e3 pro2 for the last month to compare on a mix of commuting, general road riding in urban areas and unlit country lanes and some training rides on a mix of A and B roads lint and unlit.
IQ-X and Edelux have a senso mode, and it works, that’s about all there is to say on that bit. The Supernova is on/off via switch but I just leave it on…
I’ve run them off a mix of Shimano 3D37, Shimano 3N72, Shimano 3N80 and a SP PV8, no appreciable difference in output between then (as expected).
IQ-X – definitely the brightest, but not so much so that you care after the first 5 mins. Beam pattern is nice and wide nearby, and has good throw, annoying junction between the near and far split of the beam though, but you get used to it pretty quickly. Standlight is a bit pants, and doesn’t last long. Build OK, light enough and the flexibility of mounting (hanging or normal) is good. Flimsy cabling, it works but not sure how robust it will be if snagged…
Supernova E3 pro 2 – different beam to the above two for sure but I like it, the nearfield illumination is a little weak bu the main bulk of the beam is nicely shaped to the point that you have seen everything you need to see before it goes into the weaker bit nearby so not an issue. it is quite a heavy lap though, not in a make your bike heavy way, but if you’re using anything but the included mount you need to be aware its a bit of a biffer.
Edelux II – not quite as bright as the IQ-X, on a par wiht the Supernova but spread better, has the best beam pattern for me with good throw and nearfield, and fairly even between transition them. Standlight is the best of the 3 by far and the build quality is superb and it’s a sensible weight. The Cable is the sturdiest by a long way.
I think you’d be happy with any of them, and by extension the cheaper B&M IQ that the Edelux borrows the optics from (whichever model it is)
One thing to bear in mind with them is that as proper road lights with beam cutoff they are of course very friendly for oncoming people, but they can be a little lacking for faster riding, I’m happy up to about 25-30mph, but high 20’s and anything over 30 and you can start to outrun the beam so you either need to be aware and ride appropriately, or have something beefier with more throw to turn on when required.