I haven't grown this strain before but all the autos i ahve grown (5 or 6 strains) have had fan leaves turning yellow from 50-60 days, they are starting to die.
Also, is this a 100 watt light ? (nice results for such a low wattage). I think the minimum distance is about 40 cm otherwise you can get bleaching, how close is the light to the plants ?
Watching with interest as i plan to turn LED in thew autumn.
All the best,
nibs.