5500k is used for photography as it is the spectrum emitted by the sun so daylight, it can be used for that reason however i would expect better results with 2700k and 6400k
i have one of these with leds http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200496920180&refid=store#ht_2775wt_951...