Like it or not, LED's are the lights of the future because they are so long-lasting and energy efficient. They are also infinitely flexible in spectral quality , i.e. the color they produce. The prices of LED's have dropped dramatically recently and are increasingly available. (No, I have no financial stake in LED technology, but I do have a professional interest in light options for indoor plant use.)
Here is a link to an excellent scientific source of information about using LED's for indoor plants:
http://www.designingwithleds.c...
