Cold weather backlight only 30%. Problem with user and settings or device?

Hi, I have brand new Explore 2, with newest software. Display is dark when temperature only couple of minus degrees Celsius and device limit backlight to 30% even with full battery. Device doesn’t let me manually change it higher. Thats not enough for my fifty years old eyes. I’ve try to change display and battery saving settings without success. I’m really frustrated and changed back to using mobile phone. Any hint for good winter settings?