Yes, 4272 pixels is definitely too large. You will have to compress it so much to get it down to the 2MB limit that the compression becomes painfully obvious. 🙁 I think it’s way better to reduce the pixels to ~2000 pixels, and combine that with some compression to get the file size well below 2Mb. Most of the pictures I post on this forum are from 500 – 800 KB, which is less than half of 2 MB!
I found a really good tool for visualizing the file size difference just from compression with Lightroom! Jeffrey’s “JPEG Export Quality Tester” Lightroom Plugin It’s a plugin for Lightroom that will export one picture at various compression levels with the same pixel dimensions. I was truly astounded by the results! I have always exported my pictures from Lightroom at 100% Quality; I mean, after all, photographers need the best quality, right? However, after seeing the results with several different pictures exported with the plugin, and comparing them at 1:1 zoom, I concluded that there’s absolutely no point in a jpg that “weighs” 8 MB instead of 3 MB when there’s no visual difference! If I ever need the high-quality files, I can always re-export a high quality jpg from the original RAW file.
What I recommend for @Mr-Quebec is to use Fast Image Resizer, it will reduce pixel dimensions and compress at the same time. The default of 88 for the compression is fine, that’s what I’ve always used. Open the ‘Resolution’ dropdown on the little Fast Image Resizer window, and click on ‘Edit List’ then type ” 2000×2000 ” click ‘Add’ then choose that option when resizing to post on Lenspiration. It’s that simple!