To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Can't say anything about longevity after just installing them, but I put 2 of these replacement bulbs in my kitchen light this weekend. They lit right up, and make a nice white light. I'm very happy with the appearance and amount of light. Great price, and they arrived quickly as well.