This encompasses all I have used as light sources and generators for cycles, battery and dynamo.
Peter White cycles in the USA has a huge section on lighting and dynamos and has carried out a fairly exhaustive testing procedure on all he stocks.and is an invaluable guide to the serious cyclist.

The lighting industry is in constan flux in the Cycling realm and the innovators are constantly changing bulb lens and reflective technology.

I tend to stay with B+M, dynamos in hub form are SON, Shimano and Novatech, there is still room for the bottle dynamo but its use is getting less and less.

I get asked very little for battery lighting no reason just do.
So I stock very little in this area.

I shall be using my dynamo a lot more this winter as I will be trainingg for some distance riding events so I will chop and change around a little to see what fits.