Well done everybody. Excellent test providing unbiased results.
FWIW I have just purchased a Shimano dynohub and B&M Lumotec IQ Fly, to replace my Smart BL201H rechargeable.
I rode out for a short test on Saturday night, and am VERY pleased with the result, although my gear cables are in the way, so will have to tie them back somehow.
Incidentally, for those interested in weight savings, the Smart light plus battery plus wheel/tyre weighed EXACTLY the same as the Shimano DH-2R40 Dynohub, wheel, tyre and IQ Fly = 2.655kilo.
For thsoe intested in cost, the Smart I picked up for £26.00. The dynohub I bought privately off eBay for £46, and the B&M Lumotec IQ Fly was £65.00, so a dyno combo for £111.00. I had always promised myself a SON hub and Solidlights, after reading the input of many others, but still cannot afford it.