I've caught them at night while burbot fishing, but not with enough catch rate to make it worthwhile as a targetted trip. One time I got over a school of little guys and caught 5 in a half hour, but it was a moonlight night, and I think just random luck. My guess is that they don't move much in the night time, so if you find their hang out, you can get lucky. My go-to for night fishing, burbot or trout is a 1/2oz glow whistler jig with a glow twistertail grub. /my 2cents.