I must hold my hand up and admit it.
I very much like lightsabres.
It seems to me that they are all custom jobs, not stock. So flashlight most like a hilt would be something like the Gotham or Titanium Mcluxes or the modded and fluted Mags. Actually, now I think of it, the Lumaray is a lightsabre in all but blade!!
In the past, I have had choreographed lightsabre battles with friends in smoke filled rooms with torches. The sound FX were vocal ones.
I recommend modded Mag D or C torches for a tight light 'blade'.
May the Flash be with you...