I've seen people mention evergreen brand on here a few times but don't know much about them. I don't have test results to know what the output looks like. It's possible that there are quality control issues so it may be best to stick with well known brands like the Arcadia or ZooMed (PowerSun) MVBs. You could also switch to a T5 Arcadia bulb for UVB and use a separate halogen bulb for heat. There are several good options, but it's almost always worthwhile to invest in the highest quality brands for UVB lighting.
You could try swapping the bulb out temporarily and replace it with a plain halogen bulb for heat and see how she reacts. That will help show if she is avoiding the MVB or not. It could also just be that she doesn't feel like basking. If her appetite and behavior are otherwise normal, she may be OK and just not in a basking mood which happens from time to time.