Welcome -- and yes the 75 gallon sounds wonderful-- w/ front doors I am hoping-- also the lights you have on top the tank arent doing her any good -- the UVB is that a coil? Here is some info for you on that subject---Which
UVB light should I use?
The best
UVB light is a ReptiSun 10.0 fluorescent tube (Or Arcardia 12% in the UK). Compact or coil bulbs do not emit the proper amount of
UVB light for a bearded dragon, and should not be used. Other brands, such as the Zilla Desert Series and ReptiGlo have been known to cause eye problems and other health issues with bearded dragons, and should be avoided. The reason that some UVB lights (Zilla, ReptiGlo, coils/compacts, ect.) are considered dangerous is because the wavelength of UVB that they emit is shorter and more intense than the wavelength of the "safe" lights (ReptiSun, Arcadia).
UVB lights should be replaced every 6 months for a T8
**Note: Fluorescent light bulbs contain mercury, so you shouldn't throw away your used ReptiSuns. Take them to a facility that will dispose of them for you. Some hardware stores such as Home Depot may take your used bulbs for you.
The UVB needs to go inside the tank depending on the screen on top -- if its a fine mesh inside the tank - if its a wide screen it can go on top the T 5 is a stronger bulb and only needs changed out once a year whereas the T 8 2 times a year--- the basking light can stay on top of the tank but your UVB would need to go inside unless the screen on top is wide holes- hope this helps
Karrie