used a hamilton 10k DE on my frag tank, and really liked the color - some growth. have coralvue 14k SE on my display for the look, and run cv reeflux 10k DE only four hours a day for growth. i have heard great things about the pheonix 14k (or maybe it was a 13k, dont remember). when my 10k bulbs need to be replaced, i will wither go with the pheonix or cv reeflux 12k.