The LED’s Dark Secret

Solid-state lighting won’t supplant the light bulb until it can overcome the mysterious malady known as “droop”

A recent IEE Spectrum article is certainly worth a read. Richard Stevenson discusses the phenomenon known as droop which has the best minds baffled. LED’s at low current well out perform incandescent lights and even fluorescent but at commercial light levels droop kicks in plunging their efficiency. This is a serious setback in LED technology grabbing a significant share of the 100 billion lighting industry. I found it particularly interesting that white LED’s are actually blue.