If you need more than 100 watts for either a larger tank or a tank in a cold room check out this zacro reptile heat lamp that comes in at 150 watts.
Bearded dragon lighting guide.
The use of full spectrum lighting is necessary to provide your bearded dragon with the right amount of uv radiation it needs.
Ideally the uvb bulb should span 2 3 to 3 4 the length of your tank.
In your use of fluorescent bulbs do not use the regular ones for humans but use the ones specific for desert dwelling reptiles.
You need the right temperature uv radiation and so on and so forth.
The ultimate bearded dragon lighting guide setting up a terrarium for your dragon can be very hard if you are a beginner.
Choosing the right size uvb light is very important in keeping your bearded dragon healthy.
At 100 watts each one light bulb should be sufficient for heating any bearded dragon tank unless extremely large in which case you would need 2 bulbs.