You are in the first week of flower they will stretch you want this in flower to build up your buds more stretch more buds its a good thing add more 660 and watch them shoot threw the roofπππ»π»
As Michka said lights to far away. Your tent looks very crowded enough fresh air exchange is important. Consider more smaller lights rather than 1 big. A mix of light types has proven good results e.g. HPS & LED together.βοΈπ»
Hi ! Your lamp is too far from them.. Lower is better... 40 to 50cm above your plants will be perfect ! Your plants are searching for more light, that's why she stretch too much ! Wish you the best ! Michka