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I did the math provided by FJK (the calculation was easy, thanks)

I got 1.13ohm and 1.13w.

So going to a higher resistor won't affect the brightness, does it affect battery life?

I found the calculator. Correct me if I'm wrong. According to my plan,
Source Voltage=3.7v
Diode Forward Voltage=2.57v
Diode Forward Current (mA)=1000mA

The calculator output, 1.2 Watt...

Given the option I would rather have the single cell 18650, have plenty of them already. What resistor would you recommend?

Hello all, I'm building my first saber. I want to start simple but with plenty of room for upgrades. I've attached a photo of a wiring guide and parts, I would appreciate any advice on my plan.
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