DX  » Community » Reviews » UltraFire WF-501B 3W UV 395~400nm LED Flashlight with Clip (1*18650/2*CR123A)
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  • Overall Rating: 4
  • Price: 3
  • Quality: 4
  • Ease Of Use: 5
  • Usefulness: 4
OK, Nice UV, NOT 3 Watts! – UltraFire WF-501B 3W UV 395~400nm LED Flashlight with Clip (1*18650/2*CR123A) Reviews

posted by jdutch1 on 10/02/2009 Certified Owner

Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month

Pros:
Reasonable price for a UV flashlight. Looks nice, most build quality is good.
Cons:
NOT 3 watts as advertised! Measured input power about .75W (.2A @ 3.8V)with freshly charged UltraFire LC 18650 cell. LED not centered properly, main beam off to one side. Flashlight body a little short for the UltraFire cell, sanding down the plastic spacer in the head section helps, otherwise do not tighten the head or cell cap too much.
Other:
Bottomline:
With a few mods, this light is nice. I guess advertising at 3 watts does sell more units?...(worked on me!!!),though all I care about is optical power out, don't have an easy way to measure that. Maybe others have measured and found the power is 3 watts. If so maybe post your results.

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