I thought this article might be of some interest since I've noticed some others besides myself have an interest in white LEDs. This is a fascinating development since it puts the efficiency of white LEDs at about the same point as compact fluorescent bulbs and T-12 linear fluorescent tubes. The T-8 tubes still do somewhat better, however, at 80 to 100 lm/W, but white LEDs should surpass this benchmark within a few more years at the most. Current production white LEDs, at 20 to 30 lm/W, are already the most efficient means of generating small amounts of light. Very small fluorescent tubes are far less efficient than larger ones, and require far more complex driver circuits than white LEDs. Incandescent bulbs of any size are inefficient(<20 lm/W), but the small ones can be as low as 1 lm/W. Moreover, dimming bulbs to save power causes them to be even less efficient whereas white LEDs actually are more efficient at smaller currents. For example, decreasing the drive current from 20 mA to 5 mA results in an increase in efficiency of about 40%(power is reduced by 75% but light output is only reduced by 65%).