Starwberry cough problem

[Alien3000]

Please help i am growing strawberry cough strain am at day 23 of flowering ... am using 5 gal pot in coco soil mix with cfl light about 340 watt and in grow tent ... the problem is most of the lower leaves and some leaves inside the plant are turring yellow and most of the leaves are willting ... is this a nitrogen defenciy or overwatering or low light ?? Please help me . I posted some picture maybe its help to detecet the problem thanks a lot

 

[kingfish]

Nice plant Alien, I don't see anything wrong. Is normal to have some fan leaves to turn yellow later on into flowering. You want to cut back on nitrogen once they go into flowering. I say keep doing what you been doing. BTW they don't look over watered either.
One other thing. If you can increase the lighting, 600w or better, you would increase your output.

 

[Alien3000]

Thanks a lot mate ..... am follow flora trio chart drain to waste ......i willl keeep going with it thanks a lot