XM 20K, do these get whiter over time?

[Myka]

All bulbs fade towards the red spectrum, which in the case of blue bulbs means fading whiter. That XM 20K won't ever match or come anywhere near the color of the 14K though. Also be aware that the PAR coming from the 20K will be A LOT less than the 14K, so some of your corals may not be happy with the light anymore. When you eventually add a 14K back on there you will have to acclimate the corals to the increased intensity.

[GreenSpottedPuffer]

Personally I think the left looks much better than the right

[sharuq1]

I have the XM 14 or 15K's over half the tank. I find they do get less blue over time.

[mark]

thinking I'll be going back to 14K. I really liked the Hamilton 14k over the 14K Ushio (find yellow) but had a few blow after 6 months or less (the Hamilton's)

not sure what brand to try now

[Sebae again]

Try Phoenix 14000 k. They have a nice touch of blue.You have a great looking tank.