20385 LEDs in Olympic rings
They're 14 metres in height, have 20,385 individual LED lights and weigh 9,100 lbs. As part of the 2010 Winter Games' sustainability priorities, the lights in the display use energy efficient bulbs that consume 8.8 per cent of the electricity of equivalent incandescent bulbs.
Here is the full article: http://yvrconnections.com/2009/05/yvr-gets-olympic-rings/
which includes a video.