The difference is jarring

 There was nothing fundamentally wrong with this light fixture in the guest bathroom,

but it was looking a little too Home Depot-y 

for my current aesthetic (yes, I watch too many design shows),

which is veering toward the eclectic side of things.

Besides, what's not to love about a mason jar?

Anyway, I saw a few Pinterest postings which showed jars 

being used in existing light fixtures, and I got inspired.

First I removed all the old glass shades from the bathroom fixture. 

 The collar thing that held up the shade
would soon be holding up a mason jar lid instead.

 I drew a circle on the lids to match the size of the collar.

 Then I had to figure out a way to cut out the circle.

A hammer and chisel sort of worked...

 ...but an old pair of goat hoof trimmers worked better.

Then I pushed a collar into a lid...

 and screwed the whole thing onto the fixture. 

So far, so good!

 Then I screwed the jar into the lid and everything fit and tightened up just like magic!

 Then I took it all apart because I forgot to screw in a bulb first. 

 Speaking of bulbs, I used the frosted LED kind. 

I learned through trial and error with the mason jar fixture in the sunroom

(purchased on Etsy...without a bulb)

that various other types of bulbs throw off way too much heat 

and the jar gets burning hot, unlike the LEDs which stay cool.

Much less Home Depot-y and much more me.