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  1. #1
    Join Date
    Sep 2005
    Posts
    510

    Default Life Belt Lights

    As most lights on horseshoe-shaped life belts spend 99.99% of their life upside down, why do manufacturers design the lens to screw OVER the body of the light - so rain water runs down inside? Surely better that the lens screwed INTO the body so that rain runs off? I think the rubber washer would keep the sea out for the few hours it may actualy be needed 'right way up'.

    Are there any designed like this, or have I just been unlucky?

  2. #2

    Default Re: Life Belt Lights

    As best as I can recall the ones I have come across screw over the body as you say. There may be some that don't, but for those that do and have o'rings for seals, I replace the o'rings with decent ones from an engineers' supplier as on the cheaper lights they are generally of very poor quality and stretch when screwed down onto and then prone to leak.

    John
    <span style="color:blue">www.sailroom.co.uk</span>

  3. #3
    Guest

    Default Re: Life Belt Lights ... I use a McMurdo ...

    Full size Commercial Ships job .... which as you say has the lens screw on over the body.

    I don't find water getting into the lens or light .... but a problem that cannot be fixed is condensation inside the lens fogging it up. If you open the lens and change batterys on a cold dry winters day - lens is nearly always clear throughout the year .... do the same job on a warm balmy summers day ..... then you soon find on a cooler day the lens fogging up.

  4. #4
    Join Date
    Sep 2005
    Posts
    510

    Default Re: Life Belt Lights

    Walk along any marina and you will see many lights with pools of water in the bottom. And the safety checks organised by the RNLI find many U/S lights of this type.

    It seems to me there would be little cost difference in doing the better design. Maybe Jimmy Green ought to get in there...

  5. #5
    Talbot's Avatar
    Talbot is offline Registered User
    Location : Stavanger, Norway
    Join Date
    Aug 2003
    Posts
    13,581

    Default Re: Life Belt Lights

    Had no problems with mine over the last 18 years - possibly cause I always use silicon grease on the threads and O ring.
    "Be wary of strong drink. It can make you shoot at tax collectors - and miss."
    Robert A Heinlein

  6. #6
    Guest

    Default Re: Life Belt Lights

    Vaseline, Silicon grease, even ordinary grease !

  7. #7
    poter's Avatar
    poter is offline Registered User
    Location : Now in Tuscany but going south soon.
    Join Date
    Feb 2002
    Posts
    2,036

    Default Re: Life Belt Lights

    Nigel,

    just a thought isnt there a potential problem with vaseline &amp;/or other grease reacting with some metals? &amp; the preference these days is for silicon grease in nearly all applications for seals?

    poter
    Poter

  8. #8
    Guest

    Default I was onlt agreeing with other guy ...

    But the lights are generally HD Plastic anyway - so whats the problem ??

  9. #9
    jerryat is offline Registered User
    Location : Nr Plymouth
    Join Date
    Mar 2004
    Posts
    3,570

    Default Re: Life Belt Lights

    Yep! Agree with you and Talbot, silicon grease will do nicely!! It does also pay to renew the 'O' rings from time to time though, as we find they tend to flatten as described above and open up the risk of leaking.

    Both mine seem to be happy with this sort of maintenance and we've only once had a drop or two in one of the lights, in many years of sailing.

    Considering the use this kit is designed for, the standard of construction even on my 'expensive' ones leaves a lot to be desired IMHO.

  10. #10

    Default Re: Life Belt Lights

    Am another grease user for the lights (Dare I confess to using Vaseline? As is easy to buy straight off the supermarket shelf and never had a problem with it).

    John
    <span style="color:blue">www.sailroom.co.uk</span>

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