Yellow Leaf Edges?

[butterfly_muse]

Afternoon, all. I have noticed that on several of my 'chids, the outer edges of the leaves are starting to turn bright yellow. I have no idea why. What causes this? We recently moved, so it could be too much light? I moved them down away from the window, but one of them was getting yellow edges before I moved. Otherwise, they seem just fine. So far, it hasn't spread to the tops of the leaves..just the edges.