Automatic laptop brightness

Just create crontab :D

#crontab -e

0 08 * * * DISPLAY=:0 xbacklight =20
0 09 * * * DISPLAY=:0 xbacklight =30
0 10 * * * DISPLAY=:0 xbacklight =35
0 11 * * * DISPLAY=:0 xbacklight =40
0 12 * * * DISPLAY=:0 xbacklight =40
0 13 * * * DISPLAY=:0 xbacklight =45
0 14 * * * DISPLAY=:0 xbacklight =45
0 15 * * * DISPLAY=:0 xbacklight =45
0 16 * * * DISPLAY=:0 xbacklight =35
0 17 * * * DISPLAY=:0 xbacklight =30
0 18 * * * DISPLAY=:0 xbacklight =20
0 19 * * * DISPLAY=:0 xbacklight =20
0 20 * * * DISPLAY=:0 xbacklight =15
0 21 * * * DISPLAY=:0 xbacklight =15
0 22 * * * DISPLAY=:0 xbacklight =15
0 23 * * * DISPLAY=:0 xbacklight =15
0 00 * * * DISPLAY=:0 xbacklight =15