While light-emitting diodes, or LEDs, have long played a role in consumer electronics and displays, solid-state lighting (SSL) is now emerging as a potential technology for everyday commercial and residential lighting applications. As incandescent light bulbs are phased out because they use too much energy, and concerns over mercury affect sales of compact fluorescent bulbs, SSL is receiving increasing attention from consumers and governments seeking to reduce energy costs and lower their carbon footprint. Once LED costs come down, SSL will have a major impact on the global lighting market. While LEDs themselves are not made with silicon, silicon chips are an integral component of SSL fixtures. Thus, the sector represents a significant market opportunity for chip makers.