IR LED's
Brent is right, U can use 1 of those l'il webcams, or even a security cam will work good. Also, most camcorders will work as well, but there are some of 'em that won't for some reason or another. Try whatever ya got handy... sumth'ns bound to give an indication that yer IR LED's are working.
As to how much current they should draw, well, if specs are not available, I usually assume around 15-20 mA as a rule of thumb. Most standard LED's are in this current range anyway (exept for the tiny led's, which are usually around 5-10 mA).
Cheerz,
Bob