Okay, neither UVB bulb
you have is adequate for a bearded dragon, but the one that I guess you're using now from AliExpress is complete garbage, I don't know why you switched from the compact Reptisun 10.0 to that bulb, but you need to turn it off immediately. I guarantee you that this cheap junky bulb is not only not emitting any UVB light
appropriate for your beardie, but it's most likely emitting harmful rays that are going to cause additional problems, most importantly eye damage. You should never, ever, ever use cheap bulbs from AliExpress as a UVB source for a reptile, they are just
Chinese garbage, which is why they are so cheap. She's much better off without any UVB light
for a few days than being under that bulb any longer.
The compact Reptisun 10.0 13 watt bulb you were using is not harmful like the other one, it just doesn't emit nearly enough UVB light
for a bearded dragon. They have very specific and strong UVB and UVA light needs to grow, to develop bone density, to digest their food, and to absorb any nutrition. The 13 watt compact Reptisun 10.0 needs to be within 3-4" of your beardie to emit adequate UVB light
for her, and it's dangerous to her eyes to have a light that close. In addition, if you have a mesh lid that this compact Reptisun is sitting on, which I assume you do, the mesh is blocking up to 50% of the already too-weak UVB light
, so if this is the case with the mesh lid, she's essentially getting no UVB light
...which is still better than using that cheap Chinese bulb from AliExpress...
I don't know why you stopped using the compact Reptisun 10.0 and switched to that cheap bulb, but if you still have the compact Reptisun 10.0 bulb, which I think you do, you need to figure out a way to get it mounted inside the enclosure and under the mesh lid. The easiest way, especially if it's in a deep dome fixture and not a clamp lamp, is to cut a hole out of the mesh under the actual bulb, so that the mesh isn't blocking the light, but the fixture can still sit on top of the lid. If you are using a clamp lamp then just remove the lid all together. Either way, you're going to have to raise her basking spot to at least within 6" from the unobstructed Reptisun compact bulb for her to at least get a little UVB light
until you can order an appropriate UVB tube and fixture for her, because she needs one ASAP. Lack of UVB and UVA light is already negatively effecting her appetite and no doubt her bone density, so you absolutely must order a new, adequate UVB tube and fixture ASAP. Amazon.com is by far the cheapest place to order one of the two adequate tubes out there, either a Reptisun 10.0 tube (T8 or T5 High-Output) or an Arcadia 12% tube.
No matter which brand you go with they are both very strong, effective, and efficient UVB tubes for bearded dragons, really the only adequate tubes on the market. Whichever you choose, you'll need either an 18" or a 24" long for your size enclosure, and a matching length fixture.
The Reptisun 10.0 T8 is the weaker of the two Reptisun tubes, but is very adequate and effective if mounted correctly. It cannot sit on top of a mesh lid and the long UVB fixture must be mounted inside the enclosure and under the mesh lid, and must be within 6-8" of her main basking spot. The T8 must be replaced every 6 months as it stops emitting any UVB at that point. If you choose the stronger Reptisun 10.0 T5HO UVB tube, it can sit on top of the mesh lid because it is strong enough to penetrate through it, but it still must be within 11" of her main basking spot. The Reptisun 10.0 T5HO needs replaced once a year. The Arcadia 12% tube has the same requirements as the Reptisun 10.0 T5HO...by the way, never buy a 5.0 UVB tube, always a 10.0 for bearded dragons.
If you go on Amazon.com and search "Reptisun 10.0 T5HO UVB tube" you'll get a bunch of length choices and price choices. The T5HO tube comes in weird sizes like 16", 22", 36", etc., but the tubes still fit in normally sized tube fixtures, like 18", 24", 36", etc. I know for a fact (because I just ordered 3) that you can actually buy the 10.0 T5HO in a 22" length for less than an 18" T8 right now on Amazon, I paid $22 for a 22" Reptisun 10.0 T5HO on Amazon last week, which is a great price. No matter what UVB tube you choose, once you get on it's page on Amazon and scroll down, they will offer you a package deal for the tube and the cheapest available matching length tube fixture for that tube. Just be sure that the tube fixture has a reflector built into it behind where the tube goes, because you absolutely have to have one to reflect the UVB light
throughout the enclosure. They also sell generic clip-on reflectors in each length if you search for it on Amazon, they're cheap.
Something else that is very, very important for you to do is putting both your UVB tube and your bright white basking light RIGHT ALONGSIDE EACH OTHER, ON THE HOT SIDE OF YOUR ENCLOSURE, BOTH DIRECTLY OVER HER MAIN BASKING SPOT. You mentioned that you had your UVB light
over the "Cold Side", which is a major problem. Your goal with your lighting is to replicate natural sunlight as closely as possible directly over top of her basking spot. So both lights need to be right next to each other and over top of her basking spot in the hot side, so she gets both lights at the same time while basking. You shouldn't need any light at all over the cool side unless you have a massive enclosure. Most people that have a 40 gallon breeder tank need only a single, 100 watt bright white basking bulb (can just use a regular 100 watt household, halogen indoor flood bulb, they are all bright white; no need for an expensive, reptile specialty basking bulb at all) and then either an 18" or 24" long 10.0 UVB tube, both sitting over the basking spot in the hot side. That's it.