Prevent Moisture from Light Fixture
Prevent Moisture from Light Fixture
(OP)
Hi Guys,
I have a cylindrical-shaped outdoor light fixture. Imagine sealed Dia 8in x 30in tall clear cylinder. light source at the top end.
The fixture is sealed well and is water-resistant. Still, periodically, I observe a moisture patch on the inside closer to the bottom part of the cylinder. Is there a way we can prevent this from happening?
Thanks
GC
I have a cylindrical-shaped outdoor light fixture. Imagine sealed Dia 8in x 30in tall clear cylinder. light source at the top end.
The fixture is sealed well and is water-resistant. Still, periodically, I observe a moisture patch on the inside closer to the bottom part of the cylinder. Is there a way we can prevent this from happening?
Thanks
GC
Thanks,
GC
RE: Prevent Moisture from Light Fixture
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Prevent Moisture from Light Fixture
A dry nitrogen purge would slow the process down.
I have also seen fixtures where there was an internal cavity in the top of the fixture to hold a desiccant package. this can often give you a year of moisture free operation combined with good sealing.
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RE: Prevent Moisture from Light Fixture
https://www.gore.com/products/categories/venting
Vents utilizing Gore-Tex technology can prevent water from entering the fixture while also allowing water vapor in the fixture to escape.
RE: Prevent Moisture from Light Fixture
You might actually be better off venting the cylindrical fixture top and bottom so you get some air movement in and out of the can. You want a drain hole at the bottom, and of course, you can’t plant it in water. You want it to shed/resist taking on any water in a rain storm, but it is very difficult to stop it from breathing during the hot and cold cycling as EdStainless suggests. The top vents should be under the top lid and its drip edge. The bottom vents should also be shielded in some way, against driven rain, and a few inches above grade.
RE: Prevent Moisture from Light Fixture
I am glad I shared my concern here. Thanks so much for sharing various ideas. Can't wait to try them.
Thanks again
GC
Thanks,
GC
RE: Prevent Moisture from Light Fixture
TTFN (ta ta for now)
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RE: Prevent Moisture from Light Fixture
https://www.gore.com/products/gore-automotive-vent...
Gore has a solution for this problem. They have other options that work as well. We have thread mounted vents on our flood lights. Zero condensation after 3 years now.
RE: Prevent Moisture from Light Fixture
I would be curious to know if there is way to figure how many gore vents we should use. Or figure how many we need. I am sure there is a relation to volume.
I will check their website or check their tech support.
Thanks
GC
Thanks,
GC