True, they are bright if you look straight down, but I dont make it a habit to look straight down on them often when I play.
They do make leds that are designed to scatter and diffuse light better, I dont know where I seen them or what they referred to them as, but I know they exist.
In my panel, I am using 3/4in plywood, so by the time I go through that length on top of the nut I am was only able to put the leds right near the bottom of the threads, so depending on your setup if you have less thickness and put them closer up they might show better.
Overall though, they may not show up that great in bright light, but where I play it is usually dimly lit anyways and they are gonna show up great.