I need to replace the Odyssea MH HQI bulbs in my fixture. They are pretty yellow and are supposed to be 15K rated. I don't know if I should get 14K or 20K bulbs??????
Get 20k bulbs if you're buying Odyssea bulbs. Although I would recommend buying another brand of bulbs altogether.
Also do you use the Odyssea electronic ballasts? The stock Odyssea ballasts don't have a very high power factor (something like 0.63 versus > 0.90 like most other ballasts). I would recommend replacing the ballasts with better ones
ballastwise.com have some decent and inexpensive ones.
I ordered some no name ones on line. I got the 20k. they were really cheap for 2 so I guess if they work for just a month or 2 I will be happy. And I think I will upgrade the ballast over the next couple of months also.