Thank you very much. All the links look promising.

The LED Supply link has a luminous intensity of 20 mW. I am not sure if this is same as Irradiance, which I need to be 220 mW/sr.

Nonetheless, both Jameco and LED supply are good sources and I will explore more.

On Saturday, April 9, 2016 at 9:25:20 AM UTC-7, wrote:
http://www.jameco.com/1/3/infrared-led-940nm

http://www.ledsupply.com/leds/5mm-le...7T5hoCfJrw_wcB

http://www.mouser.com/ProductDetail/...rblBoCEi7w_wcB

The last link is to the original, readily available in 1 to 1000 quantities.

Peter Wieck
Melrose Park, PA