these are a little more expensive but dimmable:
also, watch where they are located as you will probably have to pay shipping/duty/taxes/ect... on ones from china/japan
http://www.ebay.ca/itm/120W-LED-Aqua...item41669b894e
http://www.ebay.ca/itm/New-Dimmable-...item8bb596ca7c
http://reefsupplycanada.com/cgi-bin/...anada&pc=14363