How long will it last???

[Crossy]

Whilst taking down one of my 10W (real 10W) 12V floodlights to replace the COB LED device butter-fingers here dropped it from about 2m.

 

Of course, it found the only rock within 1 light-year and the glass turned into a multi-piece jigsaw with no box lid picture 😞 

 

So, not having a suitable piece of glass to hand I used some 3mm clear acrylic. The light works nicely.

 

But!

 

Just how long is this supposedly UV tolerant acrylic going to last in the Thai weather?

 

Answers on a postcard to ...

 

 

[steven100]

don't touch the Christmas tree lights for god's sake ....

 

let someone else put the star on top

[Crossy]

3 minutes ago, steven100 said:

don't touch the Christmas tree lights for god's sake ....

let someone else put the star on top

 

[Lacessit]

12 minutes ago, Crossy said:

Whilst taking down one of my 10W (real 10W) 12V floodlights to replace the COB LED device butter-fingers here dropped it from about 2m.

 

Of course, it found the only rock within 1 light-year and the glass turned into a multi-piece jigsaw with no box lid picture 😞 

 

So, not having a suitable piece of glass to hand I used some 3mm clear acrylic. The light works nicely.

 

But!

 

Just how long is this supposedly UV tolerant acrylic going to last in the Thai weather?

 

Answers on a postcard to ...

 

 

Maybe you should be asking how long will the acrylic last with the combination of LED heat and ambient temperature?

 

It's a combination that degrades plastics. Oxygen, moisture, heat. UV is only one factor.

 

Why worry? I'm sure you can arrange an ample supply of 3mm acrylic.

[Crossy]

6 minutes ago, Lacessit said:

I'm sure you can arrange an ample supply of 3mm acrylic.

 

We're down to about 1m², I've got masses of white of course.

 

The front of these lights where the "glass" is don't really get very warm, the heat is all on the back (it's a crappy heatsink, hence the COBs not lasting 1,000,000 hours).

 

In the current torrent the unit is also being water-cooled!!!

 

With my luck we'll get a lightning hit that will fry it anyway 😞 

 

[Lacessit]

1 hour ago, Crossy said:

 

We're down to about 1m², I've got masses of white of course.

 

The front of these lights where the "glass" is don't really get very warm, the heat is all on the back (it's a crappy heatsink, hence the COBs not lasting 1,000,000 hours).

 

In the current torrent the unit is also being water-cooled!!!

 

With my luck we'll get a lightning hit that will fry it anyway 😞 

 

IIRC the quote is: " I'm so lucky if I bought a cemetery, people would stop dying".

[degrub]

Heat is used to shape acrylic sheet. So, when it falls out or forms a gravity well, you’ll know it’s time to go get some window glass.