Not being a fan of white LEDs (they wipe out my depth perception and night vision), I just ordered a couple of the new Luxeon Amber K2 LEDs to play with. They're about 2.3 watts (3.4 Vf at 700mA), and put out 75 lumens each, vs the 80 lumens of the 3 watt white Luxeons.
Does anyone have any experience with amber LEDs? Are they closer to incandescent bulbs in color? Are they easier on the eyes than the white LEDs?