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Old 04-02-2015, 08:30 PM   #31
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So we we would need to have a slotted hole and screw with a washer to allow the expansion?
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Old 04-02-2015, 08:46 PM   #32
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Jim, the fiberglass has significant stiffness compared to the strip light in addition to a much lower coefficient of expansion. The light bows because it is restrained at the ends by the screws and has nowhere to move except away from the fiberglass surface.
I think you are on the right track. I am wondering if slotting one screw hole and leaving that end slightly loose would help? Kind of like hanging vinyl siding? Sealant can give. Fiberglass is very stable compared to plastic with no reinforcing filler.
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Old 04-02-2015, 08:56 PM   #33
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Tim,
Is this running light on all trailers or was it an additional set that you had installed by escape?
These are the long standard tail lights that we also chose to have mounted high as well. These lights are long and only have two mounting points. As noted in a previous post, the lower, standard tail lights have not been affected. I suspect that the upper ones are exposed to more heat and movement and are subject to the warping because of their length.
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Old 04-02-2015, 09:04 PM   #34
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Are not the lower and the higher lights the same?
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Old 04-02-2015, 10:22 PM   #35
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Are not the lower and the higher lights the same?
Yes, but my theory is they are in a protected location and not sitting out in the sun going down the road.
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Old 04-03-2015, 01:42 PM   #36
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So many variables. The integrity begins with good installation techniques. Structural backing for the lights should be glassed in so the mounting screws have some structure to bite into. Self taping screws without backing are easy to over tighten and loose the clamping effect.
I doubt that much heat is generated by the LED lights to cause expansion and warping.
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Old 04-03-2015, 01:44 PM   #37
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I wonder why the plastic light expands in the heat and not the fiberglass underneath? Maybe Brian will expand on this.
It may take some time to search the internet for an answer.
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Old 04-03-2015, 02:03 PM   #38
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I think you are on the right track. I am wondering if slotting one screw hole and leaving that end slightly loose would help? Kind of like hanging vinyl siding? Sealant can give. Fiberglass is very stable compared to plastic with no reinforcing filler.
Yes, slotting one end of the light and not tightening that end would be effective if used together with an elastomeric sealant allowing movement while stopping water ingress. Likely the most effective fix.... As Bob mentioned there are issues with stripping of the screws in just the fiberglass shell, however just providing a more stable attachment point for the screws will not stop the light bowing as the root cause is the restraint of the lights at each end combined with the thermal expansion of the light.
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Old 04-03-2015, 08:56 PM   #39
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These are the long standard tail lights that we also chose to have mounted high as well. These lights are long and only have two mounting points. As noted in a previous post, the lower, standard tail lights have not been affected. I suspect that the upper ones are exposed to more heat and movement and are subject to the warping because of their length.

Thanks techfan!

I wonder if I could request escape not to install these on my trailer? The last thing I have time for is to try to repair something like this. I have food plots to attend too!
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Old 04-03-2015, 09:04 PM   #40
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Thanks techfan!

I wonder if I could request escape not to install these on my trailer? The last thing I have time for is to try to repair something like this. I have food plots to attend too!
I would give Reace a call as he is very accommodating on most things and I'm sure he still has the round small ones.

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