I have a small lake... I've got crawdad holes EVERYWERE... I want to get these dang thing for two reasons... 1: they're tearin' up my banks... and 2: for bait! I never see 'em and I set one of those square traps from Walmart but I never get them in it.... any help would be MUCHO appreciated thanks! p.s. WHAT the heck is "artificial lighting" that evidently some folk use to catch crawdads with? DN mentions it in booklet.