If you have the uvb light inside the enclosure it may be good enough but if it’s on top you will at least a 5.0, the screen filters out half so the one you have would really be doing anything. And all though silkworms are high in fat they are not as bad waxworms and have way more protein so they are a better treat. If you can get Phoenix worms they are also a really good treat due to they have a lot of protein also.