The infra-red leds i used where the osram SF485. I managed to get 120 for about $60. They are smaller than the ... at 5mm diameter but give a greater brightness for the same power consumption. They operate at the same voltage and current as the SF485 (1.5v at 100mA) but produce a brighter more intense beam as the radiant intensity is greater an the beam angle is smaller. The primary ir radiance frequency is at 880nm which is around the peak sensitivity for the philips .. webcam.
I purchased the leds from digykey which and they arrived the next day. At the time there was a backorder on the SF485 leds so i decided to get the SF.. instead. Slightly more expensive but i figured the extra brightness might make up for it.
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