Why are my oncidium leaves going yellow green

[Mercurianmad]

Hey there I have an oncidium. it looks very sad in the pictures but that’s just because it’s a rescue.

It is growing six new roots so it will look better shortly. it’s leaves are going more yellow green in places and I’m wondering if it’s too much light?

I added an extra layer of cheese cloth in the window to try and defuse some more light for it. What do you guys think?

I have it potted in lava rock. Humidity is around 50%. I let it dry out before I water it but that happens pretty quickly. it usually gets watered every day or every other day.