The sticker you posted has nothing on it saying 366 anywhere so not sure what you are talking about. I do see the bronze but it looks like a reflection from something Why did you not just get all the windows and door from one supplier ?

The contractor that was hired purchased the doors (there were actually 4 total sliders) and the glass pieces from two different suppliers. We were unaware that there would be any potential problem with that. The picture is not a reflection at all. Every time the sun shines in (we have morning light), the two are always this bronze color. Regardless of angle you take the picture. Never seen anything like it and no one seems to know either! The paper that was glued onto each pane showed the glass company that purchased it, order and job # date and the line that stated "1/8" Cardinal 366 Tempered", so we all believed that it was Low E 366.. We still have the papers. We checked all panes (sliders and the single panes) with a lighter and they all reflect 2 yellow, 1 orange and 1 green flame, which further confuses us! I posted the info from the glass to see if someone knew what it meant, as we as laypeople do not, hoping it meant something worthwhile.

This is a color enhanced picture of LoE³-366 in reflection:

This is a color enhanced picture of Cardinal's LoE³-340, also in reflection:

If you can, try to look at the glass panels from the outside, looking in, with the inside dark but light outside. I know this might be hard to do, but if you can, what color are the panels when you are looking at them from outside?

I appears from your picture that whoever put the glass unit together possibly used glass with 340 and not 366 in those door panels.

Very interesting! Will try to look at it in the morning! We have never heard of LoE 340 so will have to Google to see what the actual difference is. Thanks!!

Can't really see any difference on the outside. Can anyone let me know how we can actually determine if it is 340 or 366? I can't seem to find anything online and I think from the pictures posted below that the mfg must have put the wrong stickers (again) on the glass, whether on purpose or not. I need someway to prove it isn't what we paid for. Am assuming that 340 is cheaper than 366, but I am not sure.

As a rule I would expect 340 to be more expensive than 366, but I don't know pricing for your windows of course.

The easiest way to determine if the doors have 340 is if they look blue from the outside looking in under the conditions that I mentioned previously, but otherwise the glass will look clear from outside. Otherwise there are a few different meters that could determine what's in the glass, but they are professional devices and very expensive.

You might ask your window company if they even offer 340, or ask them if it's available from the IG supplier.

Thanks for the info! It's just so strange that they only look bronze when the morning sun is directly shining on them. Otherwise they look the same as the Jeld Wen glass that is next to them. Is there a name for a specific device we can request from a glass company to come and test our panes? I don't know what else to do!

Wow, expensive tool! I don't know if any companies around here would have one. We actually live just outside Asheville North Carolina. Can you suggest what type of vendor I should contact? No one even mentioned this when they were giving us proposals, which I do understand since we didn't anticipate this problem, but something is definitely not right and I would love to be able to prove that what we got was not what we ordered and paid for!!

Have you asked your supplier (or AIG directly) if AIG offers LoE-340? If they say that they do, then you might tell them that you believe that you have that coating on your patio doors.

If you happen to have a local glass supplier near you, you might see what they would charge to come by and measure your glass doors, assuming that they have a gauge that could do that.

Have you washed the windows inside and out? In the first photo, one appears to be looking at the windows not through them. If the left-hand window were clean, I wouldn't expect to see the portion of the window whose sunlight is blocked by the lantern to appear clear while the rest is dingy.