Disable 4 Hard Button Backlight

[Arterion]

Does anyone know how to keep the hardware keys below the screen from lighting up when I press them? I guess it's not a big deal, but I use the keys for a lot of things, and it just annoys me when they light up, and probably wastes just a little battery. It's useless for them to be lit AFTER I've pressed it, you know? It's like it's yelling saying "OMG HI YOU JUST PRESSED ME!" lol