These lenses aren't optimal for extremely bright light, but you already know that from the 18% VLT. Use 'em for the right light and they are terrific. The right light is anything from moderately bright on down to heavy overcast, even fog, rain, light snow.
In the moderately bright light, these lenses will give adequate shading and the contrast-enhancing tint keeps things vivid. In the lower/flatter light, the lenses still allow enough light transmission and the tint raises contrast enough to actually enhance vision in these conditions.
I've had these lenses in some Straight Jacket frames for almost three years, and they are still in great condition -- no problems with the iridium coating, nor anything else.