You'll want to use the 10.0 bulb, the 5.0 isn't as strong. The 2nd one you posted should be fine. It can seem overwhelming I know. Basically you have two types of bulbs. T5 and t8 the t5's are stronger than the t8's. Then you have the output 5.0, 10.0. The 10.0 is the stronger of those outputs. So a t5 10.0 is going to yeild the highest uvb.
Completely agree with Karrie and Xp29, your bulb needs to be replaced asap. Use either a Reptisun 10.0 or an Arcadia D3+ fixture, inferior brand such as Zoomed or Thrive do not produce an adequate exposure unlike the packaging or pet store employees may claim.
Keep in mind, if your UVB fixture is up to date you don’t need to supplement vitamin D3 with your bearded dragon’s calcium.