I prefer dynamo powered, but there are issues in all types, despite my efforts with manufacturers, there are no really good headlights. I will also talk a bit about the different types of manufacturers first:
There are manufacturers who specifically aim at the bike lighting market in Europe, which includes Germany and in Germany they have strict rules StVZO/TA (you may not advertise nor sell a light as being a bicycle light unless it is approved, and large fines will be issued to dealers and distributors for doing so! This is I presume also why Lumintop stopped selling B01 on amazon.de, they were likely forced or Amazon refused to list these lights as being for bicycles…)
Then there are torch makers who decide to go into bicycle lights. In the field of torches/flashlights there is far more catering to those who want to see well, i.e. neutral white and even high CRI. But when such manufacturers go to make bike lamps they are mostly quite poor in using cool white LEDs and those who do make them in neutral white still have issues, such as a too low lux rating (which means you can’t see far with it), too narrow beam, etc. The Lumintop B01 looks reasonable but the beam should be wider and from the images I suspect that the cutoff is very soft which means it is hard to properly aim.
Some makers (of bike lighting specifically or of torches who want to get into selling bike lighting) get discouraged by the German requirements. I had an inquiry from a well known maker of torches who in response to my information on the requirements said they would for now at least not bother with selling there.
Cheap bike lights that you see on banggood, aliexpress, are usually rubbish (cool white, low lux rating, poor beam, stupid flashing modes (a strong headlight should not flash), etc.)
- dynamo powered: Almost no progress for many years, most manufacturers use cool white LEDs. Most manufacturers aim for StVZO compliance. This has some outdated rules that they could work around (e.g. to produce more light), but none that I contacted were interested in doing that… This means you get mostly cool white lights with ca. 200 lumen max. Some manufacturers are experts these days in making beams with lots of artefacts. To properly estimate the road condition (such as potholes) you need a smooth beam! (B&M are particularly apt at this sort of beam, after the original Edelux which was good, all their later lights for that reason I judge as ‘rubbish’).
Note that 200 lm is still pretty good, in my tests I saw a factor 3x to 5x equivalence with a circular beam. Circular beams suffer from overexposure of the near field, putting light where it doesn’t light up the road (upwards), and putting light where it’s not useful. If only those 200 lm lights were neutral white and smooth even beams…
- Battery powered lights: There was once the Philips saferide 80, which in total has barely been surpassed by the very expensive lamps such as Lupine lamps. The Saferide 80 with neutral white light and near perfect even beam is not available any more. I got no reply from Spanninga why they didn’t re-issue this light (but then they should do that with a Li-Ion battery). In expensive lights: Lupine uses cool white, which sucks. Supernova’s beam has annoying artefacts, and uses cool white light.
There are a bunch of cheaper lights from manufacturers that go for StVZO compliance, all of which are in the bicycle light business (not torches), and just about all are cool white and with beams of poor to at best reasonable quality.
For more information, see my website: Tests (and recommendations) of bicycle parts, esp. mini-pumps, dynamo lighting & leather saddles