Files over 25 mps help

From grid view select a few images to test quality. From within Lightroom export module, choose the setting that do not exceed 25MB. Than test it with a few and see what the quality looks like. Other wise change either pixel dimension to make samller or use quality slider to make smaller. Only you know what qaulity you are looking for so test and see for your self what works.

There are three factors that influence the file size of a jpg.

• Pixel dimensions
• Quality setting
• Image content

Assuming that the first two are constant, that leaves us with image content, which can have a significant influence on file size. 

Images with large smooth areas without detail, like sky or out of focus areas, will have a small file size,

Images with lots of sharp details, or noise, will have a large file size.

The difference in file size can be quite dramatic, like 5 - 6 times.

You can reduce the file size by lowering the pixel dimensions, or by lowering the quality setting.

Are you talking about file size? File size is measured in megabytes (MB).

The pixel count of an image is measured in megapixels (MP).

First of all, there is no Lightroom CC anymore. It's either Lightroom Classic or Lightroom (for the cloud). I work with the large 25+ MP files to do my editing, and then export JPEG images for whatever purposes I need them for. Good quality JPEG's seem to work well for sending to printing labs and for sharing with others. What are your main concerns?