hello, i think you can go closer with the light. they are looking for light, but its not dramatic atm. In the next tranplant just dig them deeper. give them an airflow to fatten the stms and you can shake them softly every day. So tiny cracks appear and the plant gets stronger. for more Info just hit the reply button.
If y setup is new to you its alittle try and error game with the adjustments. if you come to close// if light is to strong your plants " dwarfing " under the light, that means they growing with short internodial distance, if its to weak// to far away plants grow with a big internodial distance.
My advise would be watch your girls if they continue to stretch lower the light. ... just watch a few days......