Bearded dragons are referred to as sun worshipers so it's very important to give them a bright basking area.
I setup my bearded dragon with the following: 
4x2x2 enclosure at a minimum, I prefer to keep mine in a 5x2x2 or 4x2x3
When customizing the enclosure I recommend the following:
  • 2 Arcadia Pro Ceramic Lamp Holders & Brackets
    • You'll want to place these in the middle and on the side of your choice
  • Side Vents 
  • No Belly Heat

We recommend the following bulbs:

- Arcadia Halogen Basking Bulb on the right side -  I have a 75 watt bulb in mine. 
- 22” Arcadia 12% UVB bulb on the right side (Another great UVB option would be the 22" Arcadia 14% UVB bulb)
- 24” T5 fixture that holds the above bulb
- 22" Arcadia JungleDawn LED Bar on the right side - this gives full spectrum lighting to both the bearded dragon and the plants in my bioactive setup 
Some people use a fixture in the center of the enclosure for nighttime heat if needed and use a deep heat projector. 
Bearded Dragon Cage Guide Kages Custom Reptile Enclosures