I am a paramedic and I bought the $37 uf-t30 for a duty light to replace my $130 streamlight strion led. Very impressed to say the least. It is approx. 5X brighter than the streamlight at 1/4 the price. Runtime is very good. Used it for a total of over an hour with 3000 Ma/hr 18650 battery and still shining bright. The glass breaker is pretty useless. I tested it on a pop bottle. It took three whacks to break it and mushroomed the tip of the breaker. Maybe a carbide breaker tip would be better? Overall, I definitely would suggest this light for any professional looking for a reliable, durable light that its 1/4 the price of name brand competitors.