Some ideas about decreasing display backlight

[Guest ArtDen2]

I found interesting key in my MTeoR registry called "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Power"

It contains subkeys "BacklightOff", "On", "Resuming" etc. My idea is: is it possibe to edit "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Power\State\On" key values to decrease backlight of display to middle? I tried to add new registry value

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Power\State\On

"bkl1:"=dword:3

(3 means sleep state)

But it didn't help. Vice versa, backlight didn't switch off at all :) . I think it is not enough only to add "bkl1:" value, it is necessary to change "Flags" value. But I don't know how to interpret flags of this value. Does anybody know what mean each flag in "Flags" value?

PS: sorry for my english