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i can control the RH good & have a fan its just the far end is boxed in the has a higher PPFD than the plants in front so thats my only issue at the moment but just calibrated my photone meter & was out so now calibrated my PPFD is at 550 PPFD at the rear & 470 for the front, im getting a 5' x 4' tent hopefully with in the week, heres a shot of the other end that gets lower PPFD just a bit to tight for my liking with the new lightGotcha. Thanks @con, appreciate the thorough answer. Here’s a thought regarding adding a fan if you need to relative to tight space: it is very effective and takes up zero vertical space to put a fan on the floor of the tent blowing upwards. Preferably through the plants. This not only costs you no space to add a fan, no light blocking, etc, it also greatly improves your airflow through the plants. And since it comes from underneath, it takes care of any moisture you may accrue down low where it’s sometimes hard to check or see readily. Especially on the underside of the leaves. All the plant functions improve with this type of airflow I’ve found. I do it every grow now. And if you have short, tight plants it’s especially important in terms of RH control and will really help. It’s my secret anti bud rot weapon. Before I discovered this I would sometimes get bud rot even indoors. Ever since I don’t even worry one iota. Just a thought for what it’s worth!