[davepl]

Thanks! Here's what their guidance is from the website:

Q. Which bulb color is the brightest?
A. 5000k to 6000k are the brightest and also the purest white (some already sense a slight blue tint in the 6000k). The colors above 6000k become progressively more blue but less bright. Similarly, below 5000k, as the tint becomes warmer some brightness is sacrificed.