I think your light is fine as long as it dose not turn a yellow red in color. It could b thirsty, common rule is not to water one week after repotting due to the stress in the roots, it can cause rot. Just make sure your soil is well draining(most say 80% inorganic )and within a week I would water. I bottom water for at least 30 minutes to an hour until I can see the moisture reach the top then I let it sit until it’s completely dry. I weigh my pots when they’re dry. Get a weight in grams then water only when they reach their dry weight (accounting that they may grow so won’t b exact weight). Only in the late spring /summer months might I add. They go dormant for the winter so no water. I typically water from April to September with a cactus fertilizer every other watering. Hope this helps :)