I just found an Absolutelights (aka Absolute Trading) posting on EBAY.ca for a 400W 14000K SE MH bulb:
http://cgi.ebay.ca/400-W-Watt-14000K...QQcmdZViewItem
They sell other MH and HPS bulbs too. I am told that they are similar to a Sylvania bulb. Since they are cheaply priced, I suspect cheap quality as well. Have any of you purchased and burned this bulb? If so, what are your experiences?