Which? magazine is an equivalent in Britain. https://www.which.co.uk/reviews/light-bulbs/article/how-to-buy-the-best-light-bulb-a5ZLF4v6VDlw https://www.which.

Which? magazine is an equivalent in Britain. https://www.which.co.uk/reviews/light-bulbs/article/how-to-buy-the-best-light-bulb-a5ZLF4v6VDlw https://www.which.co.uk/reviews/light-bulbs/article/how-to-b... (Both will be irrelevant for Americans, I have never noticed a multi-voltage bulb.)