UV / Fluorescent SCUBA Dive Light (Trivial)
by jeremyrode in Outside > Water
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UV / Fluorescent SCUBA Dive Light (Trivial)
![ultraviolet-light-underwater.jpg](/proxy/?url=https://content.instructables.com/F7V/3YXJ/HYLZFDP8/F7V3YXJHYLZFDP8.jpg&filename=ultraviolet-light-underwater.jpg)
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 Apart the Flashlights
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![IMG_0292.JPG](/proxy/?url=https://content.instructables.com/F4J/CCJP/HYLZF9YD/F4JCCJPHYLZF9YD.jpg&filename=IMG_0292.JPG)
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![IMG_0295.JPG](/proxy/?url=https://content.instructables.com/FZC/VHX1/HYLZF9RF/FZCVHX1HYLZF9RF.jpg&filename=IMG_0295.JPG)
Take both of the flashlights apart. Pull the large springs off of the both the lamp fixtures.
Switch the Springs
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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).
Bonus Step: Getting the UltraFire WF-501B Working.
![IMG_0288.JPG](/proxy/?url=https://content.instructables.com/FGJ/RDOQ/HYLZF9W8/FGJRDOQHYLZF9W8.jpg&filename=IMG_0288.JPG)
![IMG_0296.JPG](/proxy/?url=https://content.instructables.com/FMS/5F4D/HYLZF9RX/FMS5F4DHYLZF9RX.jpg&filename=IMG_0296.JPG)
![IMG_0289.JPG](/proxy/?url=https://content.instructables.com/F0I/CP0R/HYLZF9XA/F0ICP0RHYLZF9XA.jpg&filename=IMG_0289.JPG)
![IMG_0274.JPG](/proxy/?url=https://content.instructables.com/FZU/QKJR/HYLZF9TJ/FZUQKJRHYLZF9TJ.jpg&filename=IMG_0274.JPG)
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.