Practical The MAXXEON WorkStar 364 fits nicely in your hand, but it also fits your pocket perfectly - a true everyday carry rechargeable UV leak detection penlight! The extremely powerful WorkStar 364 pumps out 600mW thanks to the special UV LED and the Lithium Polymer batteries. Forget alkaline batteries! The WorkStar 364 rechargeable inspection light will pay for itself in battery savings. The new 3X zoom lens adds extra flexibility to adjust the beam width to suit the application — and the applications are almost endless: A/C refrigerant dye leak detection Fluorescent hand stamp verification Dog, cat & rodent urine stain detection Hunters following animal trails (urine) Restroom cleanliness inspection Document and lab analysis Crime scene investigation Hairline crack detection Paint authentication Currency verification Bacteria detection Gem inspection UV curing Even scorpion hunting Performance With an output of 600mW and a run time of 35 minutes continuous operation, the MAXXEON WorkStar 364 is brighter and longer lasting than most UV LED inspection lights. At 395nm, the WorkStar 364 is a true UV penlight that is compatible with all (395nm) fluorescent leak detection dyes, unlike some of the competition that use 420nm violet LEDs. Just as important is the size of the beam. The 364's beam is much wider than competing LED penlights, without any hot spots or shadows. In addition, the 364 penlight has a 3X zoom lens, so you can adjust the beam width to suit the situation. It uses rechargeable Lithium Polymer (Li Po) batteries which are charged via a micro USB jack hidden under a sliding sleeve. The recharge time is about 2.5 hr and is monitored by a red/green indicator LED near the USB jack.