More specially have the light on 450hps from days about 1-10 of flowering, 650hps from days 11-20 of flowering around flowering stretch period, and back to 450hps from days 20-finish ( I would say mine have finished anywhere from 58-75 days). Also the 58 day strain was amazing ahahah. 75 day strain was GSC I would say 7.5 out of 10 and I'm a tough grader.... Yeah so would the 600 hps ON from about days 10-20 give the finally buds an elongated stretch??? YA FEEL ME