The Tandem goes off road and we need good lights for it. Don't get to 50 at night on the downhills- but 40 over lumpy ground needs good lighting to be safe.

But we also have a "Spare" light on the thing- and helmet lamps. Makes no difference when we get back to civilisation though- The twin 5w luxion LED that bightens the trail for 200 yards- cannot be seen by Car drivers and Peds in town. That is where the second front lamp and the helmet lamps get switched on. We still blend into the background.

Same on the rear. We use two bright rear lamps- one on constant and one on blink. We have been sideswiped twice on our night rides- because the Car driver did not see us. And the number of Peds that walk out in front of us is alarming.

But that Luxion headlamp I have- couple of years ago on Christmas eve I rode back from work. I would eventually be night riding and as it was a dull afternoon- I used it on Blink. It is bright but I did not have cars pull out of junctions in front of me. In the daylight they saw the light- looked again and let me through.