Not just the color, the brightness, even distribution of light throughout the rings.
If you prefer the ugly yellow and uneven stock, then all the power to you. And LUX is well under $500, I think he was trying to aim at the OSS kit, which can cost well OVER $500 if you have to send your lights in and have it done for you.
'11 BMW E92 ///M3 - ZCP and DCT
'13 Toyota Tundra - 4x4 Platinum CrewMax, 5.7l iForce V8