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).

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

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).

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.