They show up nicely, but I keep them in modulate mod, I figure the reason why they dont have the headlight modulate at night is the use of the headlight? Never been hassled. It's nice to be seen. I have used them at night in solid mod, used the light to setup camp. I'm going to add a second set soon, probably down low and I will decide after install if I'll run them steady or modulating. I have had a few bulbs quit, but the service from the dealer has been above my expectations.