need help with ceiling mounts

[gregzz4]

Ya, what year was your home built ?

I'll assume you looked for joists running in both directions ? Ie; north-south and east-west

We have a popcorn ceiling and I had to use a sheet of paper to get the stud finder to work correctly

I don't recommend using anchors in any thickness of drywall for your light. The drywall won't stand up to it long-term
Best info I could find was a rating of up to only 10lbs in 3/4" drywall