I had a recent look at the JW Speaker catalogue. There's at least a whole page dedicated to explaining color temperature. In it includes some color temperature ranges. Under the 3000K and less range the description, "Can fatigue eyes and make people feel tired" is given. Additionally, 5000K is promoted for improving driver "alertness" and "safety". I was under the impression that Mr. Speaker and his company were generally against this trend towards the blue. Has something changed? Has any research come out in support of high blue content white light for headlights?