TL;DR—Look! I proposed! With Ultrasabers
https://youtu.be/sQm00N94Fr0Background:My then-girlfriend and I started our relationship on many mutual interests. We're both programmers, we like similar foods... and we love Star Wars.
On our first date, I brought her a bouquet of red roses in a cheap red Darth Vader lightsaber hilt. She loved it, I still see the photo of that passed around from time to time.
When it came time to propose, of course it had to be special. But it wasn't until several rounds of (admittedly brilliant) ideas that I dreamed up hiding it in her saber.

Bunch of twist-ties later, and I'm an engaged man! The video explains most of it. I didn't plan any of it out, so my "choreography" is pretty bad! But the whole goal was to suck a little and eventually have HER "put me on one knee"! Which as you can see, worked perhaps a little too well. Given the lower light, she thought the weird shiny thing in her saber was a sign it was broken! She had no idea what I was trying to do haha. Fortunately, the Prophecy's hilt cap lets you very much see anything that might be attached to the speaker.
Oh, and for the sharp observer... yes, the tip did pop off, it is already glued back on and happy

Thank you Ultrasabers!
Lightsabers:
-Consular, Dark Violet Amethyst LED & 36" Midgrade blade
-Prophecy v3, Consular Green LED & 32" Midgrade blade