Hi, I'm new to the forum and home owning. I live in the Seattle area and want to add insulation into my house. I'm a DIY. And prefer to try to save money where I can and pay the contractors for the hard stuff. My attic currently has a form of cellulose in it that is very uneven through out. The estimate I received said that my insulation is anywhere from an R-11 to R-19 and I would like to bring it up to a R-39. I've done a lot of research about installing blown in cellulose. Per the articles and instructions, they said to install baffles to help with the air flow. I already did this. Pretty much everything I've read says that I should be able to see light come up through the baffles. The one's I purchased were about 48 inches long. I can't see any light through them. I even had someone hold a flashlight up to the vent outside the house to see and still nothing. I installed the baffles against the eves of the rafters against the wood where the three holed vents are. Did I not properly install them?? Secondly, is there a "limit" to the amount of cellulose insulation someone can blow in? From the calculations I've done for the square footage of my house, I will need to add 30-35 more bags of cellulose to bring my R value up to 39. This seems like a lot. I just want to make sure that I don't add too much insulation and cause my attic to have an airflow/ventilation problem. Any help is greatly appreciated! Thank you!