Yooperlite Hunting What I found what UV Flashlight works best?

Went Yooperlite Hunting Today found 2 nice glowing rocks 1 small rock, I had competition 6 others were also on the shore of Lake Superior I noticed they were not finding anything, they were using the Wrong UV lights, when i got home I tested my Yooper Hunting Light and a cheaper one i used for Scorpions in Arizona there's a big difference. the sodalite in them glows when a True 365nm UV light is shined on them.