Plants that tolerate low light might survive but never thrive.
Proximity to a window definitely helps pothos can tolerate a lower light and def can survive off just ambient light / t5 but if you want growth and lush foliage you'll likely need more.
The palms I don't have much experience with.
My houseplants do much better near the chameleon enclosure due to the spill off of the lights , pothos , monstera , Hoya all adjacent to the enclosure do better when they are near it vs other place in my apartment.
I always am thrilled to see new growth and shocked when I have to prune plants back the LEDs will give you noticably improved growth rates. Just cause they tolerate low light don't mean they like it. Common low light gems like spider and Snake plant and pothos thrive in bright indirect light. Soon you'll have a 8 ft pothos vine to take cuttings off and the led will pay itself off