[Rockhounds] UV Light recommendations wanted

[John Scully]

Hi, All

I just purchased about 100 pounds of hyalite opal on chalcedony from
Mexico.  Now I want to put it under a UV light.  So, I am asking for
recommendations on what to purchase.  Questions such as:

1.  SW vs. LW?
2.  Flashlight size units?
3.  Larger units?
4.  Battery operated?
5.  Price range -- this is important to me.  anything useful at around $200?

Also, does hyalite have any radioactivity?

Thanks

John Scully