If you want a much brighter LED flashlight for your camera, edit your build.prop to these values ( if you dont have these lines, add them)
SAVE the build.prop and reboot. Then check the flash light through camera app.
These are just value edits I have done and the coding is not by me.
Use it on your own risk! Don't blame me if you spoil your device ....
Sent from my beautifull white Xperia S.
Hit thanks if I have helped you.
An alternative would be install pimp my Rom app, use flash led tweaks from it, reboot, then search build.prop for the lines mentioned above, edit them according to the above mentioned lines, save them and then reboot and find the difference in flash led in camera app (when the camera captures a pic, you will notice the difference) or, in custom roms, using just the flashlight app can show the difference.