Opinions on 20K SE metal halide bulbs

[Stones]

Just wondering if anyone could recommend a good 20K SE metal halide bulb to be used on a HQI ballast.

I have been running Reef Optics 20K 250 Watt for several years now but I'm sure the bulbs (or manufacturer) has changed since last year as the colour is no longer as purple/blue as the original bulbs I had. My HQI ballast also runs SE bulbs a little hotter than they are supposed to so the colour typically shifts to a lower colour temperature than bulbs should be.

If anyone knows of a SE bulb that runs quite purple/blue on a HQI ballast, I'd like to know as I'm going to have to change mine out asap. Thanks.