Author Topic: Plastic Fluorescent Tube  (Read 3423 times)
wattMaster
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Plastic Fluorescent Tube « on: October 11, 2016, 08:03:29 PM » Author: wattMaster
Is it possible to make a plastic fluorescent tube? It could be stronger, and more flexible.
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Re: Plastic Fluorescent Tube « Reply #1 on: October 11, 2016, 08:58:21 PM » Author: Lumex120
Is it possible to make a plastic fluorescent tube? It could be stronger, and more flexible.
ISMGM. Icky Sticky Melted Gooey Mess  :D

I have actually wondered the same thing for a long time too.
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wattMaster
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Re: Plastic Fluorescent Tube « Reply #2 on: October 11, 2016, 10:02:35 PM » Author: wattMaster
Would it melt because of high temps?
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RCM442
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Re: Plastic Fluorescent Tube « Reply #3 on: October 11, 2016, 11:17:48 PM » Author: RCM442
It would suck itself in when they tried to pull a vacuum on it...it's not going to happen. You want a plastic tube that lights up, get one of those new fangled LED retrofit tubes! :P
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Re: Plastic Fluorescent Tube « Reply #4 on: October 11, 2016, 11:29:44 PM » Author: wattMaster
No problem, just make the plastic thicker.
But there's a potentially disastrous disadvantage of using a plastic fluorescent tube compared to a glass version, and that's the UV degradation of the plastic.
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Re: Plastic Fluorescent Tube « Reply #5 on: October 11, 2016, 11:50:52 PM » Author: RCM442
Not only that, plastic is can never be perfectly sealed, so it will never ever work.
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Re: Plastic Fluorescent Tube « Reply #6 on: October 12, 2016, 08:45:59 AM » Author: wattMaster
That's a bad one, unless you can attach some kind of vacuum pump so it will be "sealed".
But then you have to find space for the pump, and you might as well use glass fluorescents.
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Re: Plastic Fluorescent Tube « Reply #7 on: October 12, 2016, 09:19:28 AM » Author: Ash
Many non lighting related devices are made of Plastic and do hold gases at pressure, like an ordinary lighter..

Yep, the lighter leaking some fuel out won't affect its functionality, while the lamp leaking even little quantities of atmosphre gases in would

Yep, the fuel in the lighter is big Carbohydrate molecules, while the gases that would leak into the lamp are mostly smaller 2-atom molecules that would tend to leak easier through other substances

So maybe they would leak over long time, but that only means the lamp would have limited shelf life, not that it won;t work at all. It probably won't affect much the life of some lamp that is made for fast consumption and short life anyway. But i dont see an application where a FL lamp would be used like that
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Re: Plastic Fluorescent Tube « Reply #8 on: October 12, 2016, 10:33:15 AM » Author: wattMaster
Rough service installations? But that usually calls for long life.
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RCM442
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Re: Plastic Fluorescent Tube « Reply #9 on: October 12, 2016, 11:32:23 AM » Author: RCM442
That's a bad one, unless you can attach some kind of vacuum pump so it will be "sealed".
But then you have to find space for the pump, and you might as well use glass fluorescents.
Exactly. Just use glass ones, they just work.
« Last Edit: October 12, 2016, 11:55:50 AM by RCM442 » Logged

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Re: Plastic Fluorescent Tube « Reply #10 on: October 12, 2016, 02:58:57 PM » Author: dor123
Plastic manufacturing is less environmentally friendly than glass manufacturing, since plastic is made from petroleum, while glass are made from sand and other minerals.
Recycling of glass is easier and more environmentally friendly than plastic recycling, as glass can be reused to the same application, while plastic can't.
I think that the low pressure discharge in a fluorescent lamp, is still too hot, so it can melt and burn the plastic. Even neon glow lamps are made from glass.
« Last Edit: October 12, 2016, 05:53:41 PM by dor123 » Logged

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Re: Plastic Fluorescent Tube « Reply #11 on: October 12, 2016, 05:14:48 PM » Author: wattMaster
Then I wonder why LEDs are made of plastic, not glass...
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Re: Plastic Fluorescent Tube « Reply #12 on: October 12, 2016, 05:55:37 PM » Author: dor123
The plastic LED lamps, are made in a similar manner to a CFL. Also, the LEDs aren't gets as hot as the discharge in fluorescent lamps and the filament in incandescent/halogen lamps, so it is possible to use there the cheaper plastic.
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Re: Plastic Fluorescent Tube « Reply #13 on: October 12, 2016, 05:59:23 PM » Author: wattMaster
It would be interesting if LED lights used glass.
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Re: Plastic Fluorescent Tube « Reply #14 on: October 12, 2016, 06:03:54 PM » Author: dor123
LED filament lamps, are made from glass, as they are filled with a noble gas to cool the LEDs. So the gas probably reaches temperatures that plastic would melt. Also, these lamps intended to looks like the classic incandescent lamps, so the use of glass rather than plastic is also a reason for here.
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