Four slugs and twenty seven target loads through a Mossberg 500 did this light in I'm sorry to say. I measured both the battery voltage and the switch functionality and got a switchable 6.28v at the light base, yet no light output. The headlamp measures 428 ohms one way and 1158 the other. This just failed today - Sunday - during my club's monthly competition. I'll give Streamlight a call in the morning and post any updates. In the meantime I'm looking for a replacement lamp assy and/ or a new light. Other than the durability issue this was a great light. Fantastic output and easy to use.
Pros: Extremely Bright Easy to Use
Cons: Did not hold up
This review was written in the old system and had content requirements that are different than reviews written today.