Need info: I just changed my MH bulbs

[Myka]

Originally Posted by kien

I thought that mostly all bulbs LOSE their blue spectrum and get yellower as they age.

Yes. The Hamilton's will only get yellower as time goes on. If you don't like them now, it will only get worse. Most bulbs won't burn true to the Kelvin printed on the box. 10,000K is white, but most 10K bulbs look yellow on most ballasts. Of course every ballast will burn every bulb a little different.