I think the 20k bulbs from Spectrum Enterprises are extra blue with very little crisp white light IMO...just a hair too blue though but it is a decent trade-off considering the price. I personally was not too happy with their 14k bulbs as I thought it lacked the crisp white light and had too much yellow in comparison to XM bulbs. I have not used Phoenix bulbs.

Jack has also used their 14k bulbs.

This is also coming from someone who does not use actinic supplemental lighting.