What light did you use? is it cycling specific?
Yes, it was a cycling light, it was one light from an Electron EHP315 fitted with a 15w bulb instead of a 10w bulb with a 7.2v 4.4Ah battery. I used a Magicshine helmet mount cable tied to my helmet then a 26mm P clip to attach the light to the mount. It was not a very controlled test, just a short walk around my garden in virtual pitch black but it did look surprisingly good. I need to try a go for a small night ride to see how it looks in different street light scenario's, then upload to YouTube. The most surprising aspect was that I did not change any settings on my camera.