I wanted to replace my hamilton reefstar 250 14K bulbs so I purchased some new bulbs at 20K , from everything I ve read I thought they would be more in the blue spectrum however they appeared more yellowish red so I thought well ill go back to 14Ks so I purchased some new bulbs and replaced the 20Ks however these bulbs also appear more yellowish than my original 14Ks is there a differance in brands as far as color that our eyes can see or are all bulbs not created equal?My first bulbs where the original hamiltons about a year old could they have gotten much bluer over time and I not notice?