I have a great deal of indoor lighting. You will not usually get too much lighting. The main things to watch for are leaf burning at the tops near the lights. If the leaves are being burnt (brown) or bleeched (white), then they have too much light. Do not confuse lighter green foilage that is new at a top as bleeched. A bleeched top will become white. Light green is normal on younger leaves.

The previous comment about heating is also apt. In the same spirit, you may need to water more often as heat increases.