I have a lil over a year, female, veiled chamelelon. I currently have a reptile combo dome lamp and a zoo-med reptisun uvb bulb for my veiled chameleon.
Reptisun makes different kinds of UVB bulb. Compact bulbs (spiral or U-shaped) are not suitable for chameleons; you need a linear T5 HO UVB, either Reptisun 5.0 or Arcadia 6%. Both will fit in the same fixtures.
The Arcadia’s are generally good for a year but the reptisun need to be changed more often than that.
I'm sorry, but this just isn't true. BOTH mfrs are good for 1 year, and both are warrantied for one year.
https://www.chameleonforums.com/threads/at-a-loss-for-what-is-wrong.181811/#post-1655766
She's getting calcium from her meals, she eats every 3 days. I just don't know if she's getting enough.
If you are dusting every meal with calcium
without phosphorus or D3, she should be getting enough.
Calcium
with D3 and Multivitamins should be given (dusted) twice per month ea. alternating weeks.
I give supplements on Sundays because I can mark my calendar so I don't confuse/forget which to give when.
I feel like she's hardly getting anything from her bulb. I have a UVB testing sensor card and the bulb is working just fine, I just don't know if she's really getting much of what she needs from it.
She may not be if it's a compact bulb. The testing cards are virtually useless for this application. The best way to tell
for sure is with a UVI meter, such as a Solarmeter 6.5X or
DIY version.
Short of that, linear T5 HO UVB running the entire width of the enclosure, and replaced annually.
Sould I upgrade her to a uvb hood with a longer uvb bulb to cover whole cage? Or will that be too much, too hot, or too strong?

I dont want to overdo it either. I emailed her vet and asked all of this as well but, have yet to hear back.
Yes. No. Some vets are very good with this; some may be going by outdated information. It partly depends on whether they're experienced with chameleons, where they get their information, and how old it is.