The uvb system I use is a screw in PL type blub with a built in ballast and should be replaced at least once a year as the uv will diminish as the bulb ages
Check the first sticky post in this health room and you will see a post by Dave 007.
You will see member posts about recommended times to leave the lights on posted by other members.
And yes use bulbs made for birds as Dave explains in his post.
We all miss Dave very much.
I've been using this one for years with no problems: https://www.amazon.com/Zoo-Med-AvianSun-Deluxe-Floor/dp/B006L49LHC/ref=sr_1_4?dchild=1&keywords=avian+light&qid=1607355135&sr=8-4
These are the bulbs I use: https://www.amazon.com/Aviansun-Compact-Fluorescent-Bulb-Pack/dp/B00TNHLTEW/ref=sr_1_10?dchild=1&keywords=avian+light&qid=1607355194&sr=8-10