Lightning system

The lightning system is composed of a Shimano HB-NX60 hub dynamo and the SW-NX30 light sensor switch. The hub dynamo is superb: I cannot feel any rolling resistance, be the light on or off. I can't really tell whether the lights are on or not. Moreover, it is absolutely silent. Definitely, it beats out all my previous "bottle dynamos", which tended to slip when it was raining, to move with time, etc.

Another thing is the SW-NX30 light sensor switch. Its concept is brilliant--automatic switching depending on the light conditions. Moreover, it is expected to protect bulbs from overvoltage. However, I think that there is something in its construction that creates a significant power loss. With a 2.4W in the front I get less light that with my old bottle dynamo, and measuring voltage with a tester I'm afraid that there is a significant drop within the SW-NX30. My measuring method was quite clumsy and I need to repeat it, but if confirmed, it would be a poor design example from Shimano. A positive point is that the switching on threshold (the point at which the light sensor turns bulb on) is very well found.

As a summary, the lightning system is very comfortable (silent, no rolling resistance, no need to switch on lights when it gets dark), but with low lightning levels. For short commuting in well lightened areas it may be OK, but don´t try to go anywhere dark with it.

In the future, I may try to bypass the SW-NX30 to see if light power improves. Please let me know if you have tried it.