I guess if your room is getting super hot it's best to filter it. My room doesn't get hot at all so as much full sun I can get .
What are you growing? I like window sill grows alot lol
If you're growing in a west facing window your going to want all the light you can get,use no diffuser if you not worry about anyone seeing ,I grow in a south facing window ,I use 120 watts of led and grow some big plants no problem
It's day 19 ,1 plant 20 gallon fabric I should have went 30 thinking that's the sweet spot ,I didn't use the net till flower I pretty much use them to spread open my plant and to hold it up late in flower, this strain is a stretcher