No...seriously I like any LED that's brighter than the stock Boss ones. They'll suffice....big I think a bit bigger is better. The Barber Pedal LEDS are A-OK in my book. Not SUPER bright....just big enough to be seen.
I have personally been blinded numerous times with my Durham Sexdrive...I would bend down to adjust a control on another pedal and forget that the Sexdrive is still on and get drawn in to that blinding blue light. Next thing I know, I flinch away in pain. Boring old red or amber are good for me...but you will find a way to make it pretty, Matt.
They look good, but starting to be overdone. Moderately bright is good, and 5mm is better than the Boss size - 3mm.
The color of the LED should be matched to the color of the pedal - if a pedal is painted red or orange, a blue LED won't look good. Blue looks great on blue, silver, green, yellow or white pedals, however.