Why does my laptop screen dim after a few seconds on battery power?

It isn't actually locking or going to sleep. After a few seconds, the screen just clicks to a slightly darker setting. I have looked through dconf editor and the settings menu, and can't find any. Someone on here asked a similar question about Fedora, but it was a system update that fixed it. I'm running Debian 9, so that won't work for me. Below I will include a screenshot of my dconf power menu: To be clear, this issue doesn't plague me when the laptop is plugged in. But when it's unplugged, the computer gets noticeably darker after just a few seconds of idling. Also, the screen brightens back up as soon as I touch the mouse or the keyboard. **Solved, kind of**: While dealing with some other issues, I rebooted my computer a few times (something I hadn't done since messing with dconf) and the issues seems to have gone away. So perhaps it was just necessary to reboot after editing?