Don't water again til the pot is totally light...
I have taken indoor plants and put them outside in direct light...
I have a mini umbrella plant that sits on my coffee table that is supposed to be a shade loving plant, but I put it outside for a few weeks on my porch in full sun and it grew like crazy, no wilting...It doesn't even have lights...
I have moved tomatoes from the tent to the garden...and not seedlings, giant tomato plants straight outside...no hardening off or any such thing...plants that love sunlight like MJ does aren't usually bothered by a switch to full sun, unless they were transplanted roughly prior to going outside...or transplanted to the outdoors roughly...It just means that roots were torn and the plant is having a hard time maintaining the amount of foliage it has compared to the roots it now has since losing some...You can wait for the roots to grow by letting the pot get light in between waterings, or you can pluck off some lower leaves...this is if you transplanted and then got these issues of course... Which you said the plant was fine til you transplanted...I would just remove a few larger lower leaves... That is what I do when a plant I transplant has a mishap mid replant, or just seems to be struggling...