I was told April, but I also heard not until June or July before they have stock again. I use 14k bulbs and they color up everything, but they don't always show the florescence by themselves, but when they turn off and it's just the Quanta bars, there's florescence for days. They (14k bulbs) render color just fine, but don't always display/highlight them, but there are acropora that look drab under LEDs, but under 14k's, they shine like no other.Two things, when I bought 24 Hamilton DE 14k and 20k bulbs, I was told Hamilton would have new stock in March. Well, that came and went and I still don't see new stock.
Second, when I was running MH only, 14k, my Acro colors were not good at all. Their health was excellent, but no color and certainly no blue color. I added the LEDs and everything colored up nicely.
I don't think this had anything to do with spectrum, but the light intensity. When I added a lot of LEDs and higher par, they colored up nicely. So just keep that in mind as you go along.