A single-die LED, driven at four amps, produced 1,050 lumens in cool white and 760 lumens in a warm-white version. Efficacy of the cool-white LED was 72 lumens per watt and 52 lumens per watt from the warm-white device. Both LED versions operated at substantially higher efficacy levels than those of todayâ€™s conventional light bulbs. Historically, Creeâ€™s R&D demonstrations generally have been commercialized within 12 to 24 months.
â€œCreeâ€™s XLampÂ® LEDs are the best-performing commercially available LEDs, but we wonâ€™t be satisfied until light bulbs are obsolete,â€ comments John Edmond, Cree co-founder and director of advanced optoelectronics. â€œWeâ€™ve worked 20 years to achieve lighting-class LED performance, and we still have plenty of ways to advance the technology further.â€