Darth Maul with GSW Leds
That was Darth Maul miniature from FFG star wars legion range.
I've cut out the blades and replaced them with 1.6mm acrylicu red/orange fluorescent rod (greenstuff world) and 2 LEDS 1mm red (greenstuff world). I also used conductive paint (greenstuff world).
I have published a whole video tutorial to help you modify your own lightsaber wielders. All the stuff necessary to do it is on greenstuff world shop.
It's a pleasure to answer to any question you would have, feel free.
Dak_Rogan