I remember that article and was going to post it. Its probably the reason why I've been using Phoenix for the last 3 years. I place them over my display for 12 months at 7-8 hours a day and then over my frag tank for another 5-6 months. After about a year and a half I often get some cyano appearing under the old bulb. Whether the change in spectrum and intensity causes it or if its just coincidence I'm not sure. I guess its worth mentioning too that I use HQI ballasts which don't seem to be available anymore. According to my Apex controller the electricity they draw is actually more like 360W each.
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