Sort of.Will the introduction of UV into my pool water be the same as sunlight?
You can control the amount of UV and only use it as needed.Will I need to raise my CYA, or begin treating my water as though it gets sunlight?
The more you use it, the higher your CYA should be.
Even for an indoor pool, about 30 ppm of CYA is a good choice.
If you add UV, maybe go to 40 ppm CYA.