This time I'll share with you something that @RyokoN found out. Please thank him here. I just made proper changes to the file he mentioned.
Someday I was killed by my friend N5 torch. It was so bright. Now I decided that I want my torch to be actually useful, just like his torch is. (we were trying to see details in a dark place to fix the window).
It may break your LED if you leave it on for some time. I'm not responsible for any damage. It actually made my back around the LED a bit warm after a few seconds in the extreme version!
Please be aware that it's not safe to test it on devices that are older than Xperia Z as LED's may vary hardware-side.
Extreme version - just torch
Medium version - just torch
Medium version - torch, camera, flash, notification LED <------------ RECOMMENDED!
Extreme version - torch, camera, flash, notification LED
Revert to stock Z1 torch
It's based on Z1 .108 firmware (4.4.4), but it WILL work on 4.3 roms. Can't say about older android versions - you tell me!
Please test and let me know how it went
It's significantly brighter now. At first it barely gave any light and now it's even brighter then the light in my room on a small distance, lol.
Confirmed working on:
Z1 4.3 4.4