The Beta Light is what is recommended in the SAS Survival Guide. I believe they give about the same glow as a small (2 inch) glow stick. Good for map reading or to attract fish at night for spearing. I think it is powered by tritium like in a Cammenga compass. I hope this helps. I would like one also....
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.