Ligthing / UVB / New Beardie

So i got a new bearded dragon on 5-18-19. When i purchase the beardie the owner sold me a light (claimed to be UVB and Basking together) with a 10 gallon tank and at this point i and very little knowledge to bearded dragons. So i went home, started building her a larger cage and doing research. I noticed she was not eating as much as the website says she or he should so this got me worried considering how many issues could come into play. So i made a vet appointment, now i live in a very small town so we have no EXPERTS but she said that she had a couple customers with beardies. The vet said that she seems to look healthy and weighs in a 91 grams,(couldnt tell me age) sent me home with a sheet of stuff to do and to not do (which i already researched). So essentially got no answers, i actually i taught her some things. I have listed below my experiences so far and am really looking for answers.. Please help! I originally posted a long message and decided to break it into categories because I think my chances for receiving answers will be much greater. (See my first post if you would like to read it all!

Lighting:
I originally purchased a light recommended; SL50 basking lamp , which i found out today does not have UVB. Purchased a 10.0 T8 (will purchase t5 soon but have spent so much already on building enclosure, food, accessories, ect.)

I have a cheap temp/humidity gauge but i think they dont work well so purchased a laser thermometer.

Cool average 80-90ish
Basking: 100-110

I turn the light off at night.

Your temperature range sounds pretty good. How far away is your T8? Do you have a fixture with a reflector in it? Generally those work best in small enclosures at around 6-8'' range above the main basking site.