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Posted : July 24, 2007
Best LED color to be seem in deeper water?
I am working with a designer on a metal detector for use in the deeper water. Which color LED is the best color to be able to see? Red, yellow and green.

Thank you,
Terry in Hawaii

Posted : August 1, 2007
Hi Terry.

I've only had experience of red LEDs under water. That was using ultrasonic thickness equipment. I found red was easy to read. The tool was normaly used at arms length. Of course as the light is emited it is not relient on light penetration from the surface to show it. So I imagine most colours would show easily. Best of luck with the project.
Answer provided by Ali MacLeod, The Underwater Centre

Ali MacLeod
The views expressed by the author are their own and the publishers accept no liability for the advice and views expressed by the author, or other users, which are provided as a general service to divers. Users are warned that secondary posts are the views of other users and may not be technically correct.
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