Hi Dawn, the stars and the lightbulbs are both our way of giving you feedback on your submissions so you have a sense of how on-target you were. The lightbulbs denote that you've received a "Pitch Tip" on your pitch submission. Click the lightbulb to read feedback from the project producer. Because our producers are very busy, most of our Pitch Tips are automated, but occasionally you will receive a Pitch Tip that is tailored specifically to your pitch so it's a good idea to always read them. The stars are reserved for idea/concept/tagline projects and should give you a sense of how close your submission was to being a good fit for the client based on the project objectives.
Check out these blog posts for more information on both features:
https://tongal.com/blog/articles/updated-pitch-feedback-is-now-pitch-tips
https://tongal.com/blog/articles/idea-rating
Hope this helps! Let us know if you have any other questions.