At present the Basil Nordlicht bottle dynamo is still fitted to the Yuba Mundo, although there are no dynamo lights fitted for it to drive. This is due to my acquisition of a Brompton. After a few weeks with the Brompton, I felt that a bike such as this really needed to be all in-one, including self-sufficient lighting. It was around this time that the annual price increases for Brompton components were being rolled out. The Brompton dynamo wheel RRP was about to increase by about 15% making that then the ideal time to upgrade to the Shimano hub dynamo wheel. I had considered the fitting the Basil Nordlicht bottle to the Brompton, but the relatively good price of the wheel and my uncertainty about clearances for fitting the bottle led me to choose the hub over the bottle.
Rather than splash out on a new front light, my limited budget led me to fit the Lyt from the Yuba Mundo instead. My intention was to replace the front lamp on the Yuba Mundo at a later date, which I have still yet to do. Initially I bent the Lyt mount to fit it into the tight space between the caliper brake and the luggage block, a solution which was far from ideal. I was later able to use a Brompton Cyo mounting bracket to fit the Lyt into the limited space offered by the Brompton. I also added a Brompton rear dynamo light (made by Spanninga) to complete the set-up
The version of the Lyt I had purchased for the Yuba Mundo was the bottle dynamo version; when connected to the hub dynamo on the Brompton, both front and rear lights ran whenever the bike was in motion. Whilst not as optimal as the automatic on/off light sensor of the Retro, this set-up actually works well, due to the extraordinary operational lifespan of LEDs. It now appears that I was a little ahead of the curve in choosing this set-up; B&M’s entire 2012 range of dynamo lighting comes with the option for daylight running lights.
My experiences with dynamo lighting have not been universally positive. The standlight functions on both of the lights fitted to the Brompton failed by summer, although they were both relatively easy to fix. However, it is my ‘off-label’ riding with the Brompton which is more likely the cause of this failure than any deficiency in the lights’ designs; Bromptons are not really ideal bikes for fast riding on cobbled paths, the resulting vibrations were obviously a bit too much for the capacitors powering the standlight. Under more typical riding conditions I doubt that this problem would have occurred. For this reason I would still strongly recommend dynamo lighting to anyone, including the models of light which I have had problems with.
A great deal of dynamo lighting technology is designed by (or for) the German market. German regulations stipulate that a bicycle must be sold complete with a dynamo lighting system (except lightweight sports-bikes), including lights which conform to specific regulations for beam shape and light intensity. These regulations are more strict than elsewhere and have effectively become the de facto international standard. The misconceptions about dynamo lighting which persist in the English-speaking world means that we do not constitute a huge proportion of the market for dynamo lighting components, with equipment and information often difficult to come by. B&M in particular make great equipment but the English-language information about them is lacking. They also suffer from the Windows Vista effect; huge numbers of variants on each light model exist with relatively subtle differences between them and confusing nomenclature. These differences are seldom well explained in product descriptions on the handful of retailers which stock them.
Because of this, to help prospective dynamo light users I have produced a B&M dynamo light nomenclature guide:
Lumotec: The front dynamo light brand name.
Toplight: The rear dynamo light brand name.
Retro, Lyt, IQ Fly, IQ Cyo etc: The model name.
Plus: Includes standlight. The light (or a portion of it) remains illuminated for a few minutes after motion stops.
Senseo: Includes automatic on/off via light sensor.
N: Includes an on/off switch, intended for use with hub dynamos.
B: Basic version, lower light output but still meeting German minimum standard.
R: Taller beam, including near-field illumination of dark patch in front of wheel.
T: Daylight running lights. In addition to the beam aimed at the road, a series of small LEDs direct light at oncoming traffic to increase cyclist visibility. During the day these lights remain lit, whilst the main beam runs at reduced power or is switched off.
B&M are of course not the only manufacturer of dynamo lights, merely the one with which I have most experience. Mr Hembrow gives high praise to the new dynamo front lamp manufactured by Philips; the Saferide (repeated elsewhere). It is my hope to test out a Saferide in the future and share my impressions here. If anyone has any questions about ‘going dynamo,’ please feel free to leave a comment and I will endeavour to help you if I can.