UV / Fluorescent SCUBA Dive Light (Trivial)

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Introduction: UV / Fluorescent SCUBA Dive Light (Trivial)

If you SCUBA dive, you've seen the new UV/fluorescent dive lights but probably didn't want to spend 100s to 1000s of dollars on a light that doesn't serve as a primary (or backup) light.

Here is how to put one together from a cheaply available SCUBA light, and a cheaply available non-SCUBA UV flashlight for about $30 without any tools.

For a bonus we will also get the non-SCUBA donor flashlight working again, but this requires a soldering iron and basic soldering skills.

What you will need (Shown Below)

  • UltraFire WF-501B UV 395~400nm LED Flashlight (Bulb Donor, about $15)
  • Yellow CREE T6 SCUBA light (Cheap Chinese units available anywhere for about $15. Make sure to get the T6 version).

Step 1: Take Apart the Flashlights

Take both of the flashlights apart. Pull the large springs off of the both the lamp fixtures.

Step 2: Switch the Springs

Switch the spring from the yellow T6 and put it on the UV lamp assembly. Assemble the flashlight (with a 18650 battery or 3XAAA inside of an adapter). You are done with your UV dive light. See the next step if you want an additional flashlight (non-UV).

Step 3: Bonus Step: Getting the UltraFire WF-501B Working.

The T6 light doesn't quite reach the battery, so an unmodified WF-501B with the T6 will not work. All that is needed to make the T6 work in the WF-501B is a small battery spring. A small battery spring from another broken donor flashlight can be soldered into the center of the T6 bulb assembly. The WF-501B will now work.

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    3 Comments

    nice idea

    B U T

    Do you know that uv light could harm fluo animals?

    Thats why the business goes with the funny yellow masks...

    Many posts about that in the web....

    Nice cheap hack! However if you could use all original photos in the future it would be appreciated.

    This is a good idea and I did a lot of research on this several years ago (before cheap dive lights were common). I was actually planning on building my own light until funds ran out (I would rather dive than have a light that I can't use). I don't night dive often so it didn't seem like a good reason to invest at the time.

    One thing that I ran across while doing research is that the wavelength that sea life tends to fluoresce the best under is actually in the visual range: 450-470 nm. The main disadvantage to using blue light is the need for yellow filters on your mask or camera.