Star Wars Lightsaber use LED string

Blade is 90cm long transparent 25mm or 26mm outline diameter, 22mm or 23mm inner diameter PC(polycarbonate) material tube. Inside is white foam hollow tube and 70-80 pcs 5Φ over 10000 mcd LED string powered by 18650 Li-ion rechargeable battery with 1 ohm resistor current limiter. There is a 16mm diameter metal button switch to control power on and off. Blade is locked by four M4 8mm save screws at the hilt top.