There is a huge thread on another forum and everything I've read is they are great. I have 3 of them($89ea). I just have the blue and white LEDs. IMO the other colors are just not needed. You'll want to know what the wavelengths are and what the angle degree is. Around 450nm is what you want for the blues. Mine are 165w, 120 degree angle, 460nm blues, and 14000k whites.