I just replaced my stock Current-USA 150w 10k MH HQI bulbs with some 14k's. I have used them for about a month. They burn a nice white, but i wanted more blue. Here's a description; "The Current USA HQI Metal Halide Double Ended Lamp, 150W, can be used to replace any 150W HQI Double Ended metal halide lamp. The 10K color temperature is most commonly used with reef aquariums."
Obviously with shipping they'd be over $100. Asking $65.