i need to prune my plants to get light to the lower "tops" dont know what there actually called but its the part that keeps growing like the top but there are huge fan leafs in the way can i cut these off to get light to the lower growing parts ?? if i do will it hurt it ? there are alot of them and there blocking pretty mutch all the light i vegged with 500 watts of cfls and now i only got light from the top with my 400 watt hps sooooo what parts can i cut off safely to get more light down there