Before you go out and buy new lights you should do some substantial water changes and see if that gets them going. I have gotten excellent growth off of the cv 14k's in the past. When things stopped growing I switched to 10k's and it really didn't make much difference.

All of my water parameters were great but I knew I hadn't done many water changes over the last year. So I just did a 150 gallon water change on my 215 using Reef Crystals salt and OMG the polyp extension on my acros is amazing! Just goes to show, there's more to water quality then you can test for.