Okay, at his age and size, he should be fine if you don't leave food. If you feed him before you leave on Friday, and then on Sunday (or Monday if you get back late on Sunday), he'll only be missing a day or two.
The timer will definitely help - having the lights on or off the entire time you're gone would really confuse him. One of my beardies' bulbs blew this weekend, and I wasn't home to notice and replace the bulb until around noon (his lights normally come on at 7:30am). He sulked the rest of the day![]()