Re: [PSUBS-MAILIST] instant dive light

Just got back from the harbor, succsess !! I dropped it down to around 35' with the light on everything seemed fine. It was difficult filling it totally with no air bubbles, I had one tiny one. I may try to put some silicone on the O rings to keep any min oil from leeking by. The next time I fill it I'm going to do it in a min oil bath so I can submerge the entire light in the oil to get all the air out. Those xenon bulbs are apparently pressurized, not sure if that makes a difference. don't know how much pressure, probably not much.

On Tue, Sep 20, 2011 at 11:37 AM, Alan James <alanjames@xtra.co.nz> wrote:

Hi Brian,

I got part way through making some LED dive lights by modifying some $20- lights I bought off "Deal Extreme".

http://www.dealextreme.com/p/ultrafire-wf-502b-ssc-p7-csxo-3-mode-900-lumen-memory-led-flashlight-with-clip-1-18650-1-17670-36357

900 lumen & free freight. They operate off around 4 volts, so I'm going to link them in 3s to operate off 12 volts. They have O rings at every join

& are made of a fairly thick aluminum. I cut the body down & pushed a hose fitting in the end, then soldered in wiring & put on a tube, ready to oil

compensate. The LEDs in general take tremendous pressure, I believe a similar oil compensated system went down 10 kilometers.

Regards Alan

----- Original Message -----

From: ojaivalleybeefarm @dslextreme.com

To: personal_submersibles

Sent: Wednesday, September 21, 2011 3:30 AM

Subject: [PSUBS-MAILIST] instant dive light

HI All,

I was pricing dive lights for the upcoming lobster season and was floored by the outragous prices they charge for those things. So I decided to take my 6 cell mag light, which has a xenon bulb in it, and fill the entire thing full of mineral oil. The mag lights have O rings at all the critical points of seperation of the different segments of the light. I'm going to be dropping it down to 40' today to see if the bulb can take the pressure. If not then I'll most likely go to an LED mag light.

Brian