I have 2 27 inch 180W 15K lights available. One works perfectly, one only has whites, blue channel is out. It may be an easy fix, but I have no clue about anything electronic other than on/off. I don't have the knowledge or time to even attempt to fix it. $100 or $125 for both. I can't get my pictures to upload from photobucket. I had both over my 60" 120g reef and I had fantastic growth with everything with these. Feel free to call or text me at 330-885-3009 for more details or pictures.