If ammendments are added. I build my own but if memory serves the light mix is just that. A light mix. Start to finish you are looking for somthing like coast of maine stonington blend I think it's called. Some may finish, others will need a boost. Imo a proper built soil can be reused over and over and produce better everytime. I dont think you will find what you are after in the light mix but hey I dont used bagged soil so what do I know. Others will chime in I'm sure!
Happy growing!