I've been wondering about this for some time. All of the screw-in CFLs I've seen are in 2700k to 6700k range, with the lone exception of Coralife's 50/50 bulb. Are there screw-in CFLs in higher color temperatures?
why do you want the higher k?
im wondering the same things... 6700k is fine for plant growth.. and those types of bulbs would suck in a reef application even if they were in a higher color temp