E15 Backlit Keyboard settings?

I have a new E15 with backlit keyboard. I chose this model for that feature as I like to write in dim to no lighting. The backliting is off unless I hit a key first and then it only stays lit while using the keyboard.  I often pause to read my writing and ponder the next bit so by the time I'm ready to type again they keys are dark.

Is there a registry hack that will allow me to extend the time before it turns off the lighting? Even one minute would be a great improvement. I've been through the power management settings and the BIOS. Nothing there.