I use my 2015 Macbook Pro primarily in clamshell mode (closed with external display/keyboard) but when I put it to sleep the screen goes black for about 5 seconds and then wakes up again.
I don't have any 'stay awake' apps like Caffeine running, and I'm not moving a mouse or touching any other...
Tab Suspender for Safari
Improve your Mac's performance and decrease your battery consumption, by suspending the Safari tabs you aren't using thus freeing up the memory and CPU being consumed by those tabs
Depending on your tab count and how "heavy" the websites are, you can expect a...