Some pics from tonight. Excuse the fuzziness, handheld with the engine running and 4 seconds exposure.
Dip, riders eye view.
Main - riders eye view.
Dip from on top of the screen
Main from on top of the scree.
Now, my observations from a real world riding point of view. I went and did a quick 20 miles around the narrow lanes by way of appraisal. This is a wide, straight section, but the lane narrows in half a mile and becomes just over a car wide. Those were the sort of lanes I rode to see what it was like to ride at night with, and a bit of big B road - truck sized roads, where two artics can pass each other without having to pull over, but still a B road.
You will see there is not much difference between high and low, high beam just fills in the main bright spot a bit, close to the bike. The actual reach down the road doesn't change, not visibly at all, even if scientific measurements can tell the difference, to all extents and purposes there is no difference from behind the headlamp - bt there is a considerable difference when viewed from in front, so other drivers coming at you will see a much brighter orb on main.
I have the beam set as best I can. It suits and gives me the light to ride at a sensible pace through darkm, unlit lanes or more open roads. Now, I don't know about you, but I tend not to ride flat out at night. I tend not to ride flat out during the day either!

On dip, I had plenty of vision ahead for what I would call sensible road speed at night - on a good B road a steady 45 - 50 is quite within the lighting reach. Young chargers trying to do motorway speeds on silly back lanes through over exuberance of youth may find the light a little limiting (hopefully it will slow them down a bit, otherise the hedge will.

) Putting the hadlight onto main beam made absolutely NO DIFFERENCE to how far I could see, but it did create a 'hotter' spot on the tarmac, as I have it set, about 28 paces ahead of the bike - but as I was on my own I had to recognise a spot on the verge level with the hot spot, jump off with the bike on stand and then pace to the recognisable feature.
I am not disappointed with the performance, the lighted area is definitely brighter and I can see further down the road - but there is no real extra on main beam. Well, that makes life easier, just ride on dip at night and save main for heavy traffic daytime use if you feel vulnerable and want to be seen.
I hope that helps a bit.
