I had high hopes for these, as I felt that my other transitions lenses did not lighten enough. However, it seems to me as though the only time they go to 50% is when they are in the case!
In evening and overcast rides in the woods, I have compared them to my VR28 Flak Jackets and they are not lighter. I do seem to prefer more light than other people as my friends on VR50 transitions in the same conditions think they are great.

I am hoping that the new clear black transitions that go up to 66% will be better, but these lenses are too expensive to keep buying them!

Now as I have had my VR 50s for a while I can recommend it for anyone who doesn't feel he/she have to be extreme or flashy. The view becomes warm and comfortable in mixed conditions. Maybe the best afternoon or early evening lens of all. With the transition of the light one have several glasses in one. A good alternative would be Light Grey transition with its neutral colour.

I have this baby sometimes when I drive my car (Half Jacket XLJ) or in the late afternoon/early evening when training on my bike.
As I like the tint I recently bought a pair of Radar Path with this lens in a bright red frame. The view is wider/bigger than with the HJs and it really suits for cycling.
The photochromatic effect is good but doesn't work inside a car (have to get a convertible). Minor problems over all.