So I have done the measurements. Funny thing is the comparison I showed is also wrong, what is with HLG? So the comparison chart shows the box size under the specs, not the panel size
. According to the individual spec sheets the 550 is 26" X 20" and the 600 is 26" X 21.5". The panel they sent me is in fact a 600 heat sync and measures 26" X 21.5". I have emailed back to HLG and asked them about a replacement product sticker but have yet to get a reply.
In the end I am still not happy with this ridiculous thing they have done. There is just no excuse for a company to put wrong labels on stuff just to get it out the door. I am hoping they can send me a proper sticker for it as that is how it should be. I am just surprised at the stupid thing they have done, in the fact that their support over the phone told me that the 550 and 600 where the same panel when in fact they are not. Mostly that they didn't make a mistake but rather intentionally put the wrong label on it after having multiple complaints about the same issue. Here is hoping that this is the only trouble I have. Still have my fingers crossed that they will send me the correct label. Imagine trying to sell this thing down the road and having to convince someone of the fact that it is not what it is labeled as.