yep... you have to plan the photo to evaluate the conditions you are interested in.
My photos were to compare beam patterns among a few lights, so the conditions were selected for that purpose.

Back in the early days of the Schmidt hub dynamo, both with the incandescent Lumotec and my early LED headlights, I'd often run them in the daytime. I'd cross paths with friends and chat, and often got a comment about how visible the light was from some distance. These were not bright lights, so this made an impression on me. I'm pretty confident that even a modest front light (like my little Cateyes) are more than enough for my routine riding.

FWIW, my Cateye Rapid 3 front light had a plastic part fail, so I replaced it with the Cateye Omni 3. It fits the same mounting brackets and is roughly the same brightness. It is powered by two AAA cells instead of the single AA that the Rapid 3 used, which I'm not happy about. On the plus side, it got rid of the plastic tab design that broke on my Rapid 3, so that's a plus. I think I paid $15 for it. Hard to complain about that.

Back to the matter of photos... they really don't convey just how visible the light is. This is probably due to the lower dynamic range of the camera compared to the human eye.

Steve in Peoria