I have 6 plants (all around 4ft tall or so) under a 600 w HPS. They are in they're 5th week of flowering. Im thinking about adding 2 - 4 ft T5 lights (54 W, 5,000 lumens each) to add lighting to mostly underneath where theres not much light. Im doing this to hopefully increase yield (obviously and because ive had a bit of a powdery mildew problem, although its improving because of an added fan. I just figured there some people that can give their 2 cents on this as im a noob - only have done autoflower before.

Thanks!!

Ya It Sounds Like They Have Out Grow The Light, Being 4' Tall, Yes It Would Help To Add More Light Lower, But With That Said, A T5 Is Just A T5 So Don't Expect To Get Results That You Are Getting On The Top Canopy With The 600w. HPS, But Yes It Will Help Since Your Plants Are So Tall, If Your Plants Were Like 2' I Would Have To Say The T5 Wouldn't Help Any, Because The 600watter Would Be To Over-Bearing And Bleed The T5's Out.

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