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My understanding is that white LEDs are phosphor coated so that they emit in the correct spectrum.
This effectively makes them no more efficient than a fluorescent light.
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<font size="2" face="Verdana, Helvetica, sans-serif">I don't understand your statment Fred. LED's are a much more efficient lighting source.
Maybe I am missing what you mean by inefficient. To me that is dealing with power losses to produce that light. If you were to sit and look at how many lumens a flourescent lamp puts out per square cm of lamp compared to these LED's I am sure you will find the LED's producing as much illumination if not more.
The big drawback to high intensity LED's at this time is cost. They are prohibitive. But I see them as something we may want to look into. Low heat production, low energy consumption are two very strong points IMO.