Sure thing. First cut the steel to a tight, heat‑sealed shell that holds the crystal and a reservoir of that enchanted stuff. Seal it so the crystal can draw the fuel out by capillary action. Then bolt on a simple wick system that feeds the crystal whenever it starts to dim. Keep the whole thing in a single, sturdy unit – no fiddly parts, just press‑fit, screw, seal. That way you get a lantern that never burns out unless you run out of crystal, and you can swap it out in a snap. Works, or it doesn't.

I’d keep it about twelve centimeters tall, eight wide – big enough to light a room but light enough to hold in one hand. The crystal would be a deep amber, like old copper, that’s warm but not harsh. For the weather shift, a tiny temperature sensor could dim the glow when it’s hot or brighten it on a cold night. No fancy electronics, just a simple circuit that lets the crystal respond to the room’s heat. Keep the shell sealed and the crystal in place, and the lantern will be a workhorse that just works.

Sounds solid. Build a prototype next, run some weather tests, then we’ll see if it actually stays warm enough to shift that glow. When it does, that’ll be the next standard in hand‑held light. No more fuss, just a reliable, warm glow.