I just bought a 4 rack of T5s lights and added some coral-vite, then top the tank off with some kalkwasser mix just like my LFS guru said and it took 3 days and now the crushed coral is caked bright red.
I went to one of the many LFS in my area and (even though the rest of the store looked a bit run down) the saltwater tanks were all bright red and purple so i asked the guy who was running it; i followed his instructions and it really is amazing. I am sure it will take time to spread over the LR but i see the purple,red, and green coraline growing in my tank now.