Q.Low height pine tree
I need a low but wide pine tree to provide a natural barrier. I initially was thinking a Japanese Red Pine but I dont think they would grow well here in Philadelphia and its in a somewhat shaded area. Any suggestions ?

Pines, are generally not shade tolerant, but some other pine family conifers are. Here are a couple of articles that might help you with possibilities. Check the cold tolerance of any selection you are considering, Philadelphia is in USDA plant hardiness zones 7A and 7B. You can do that by entering a search phrase like this: - plum yew plant hardiness zone -
https://www.gardeningknowhow.com/ornamental/trees/tgen/conifers-for-shade-gardens.htm