Over Sun? Under Sun? What is happening?

I have a string of dolphins, it’s about a year old now and was thriving up until we moved further north. I got a grow light and I have it on for 4 hours in the evening right after the sun goes down, and it gets good light during the afternoon-evening. Can we tell if it’s getting too much light or too little light? Watering schedule is the same as it’s always been so I know watering isn’t the issue, so I assume it’s something with the sun light. Please help!! This plant is my baby 😂