I took a picture of my 2 IR-pens side by side



Here we see 1 noname IR from a tv remote probably about 20 years old

And the brighter (brand new) one is rated like this:
IF: 100 mA
clear: 5 mm
beam: ±25°
VF: 1,2 V
Wavelength: 940 nm


Ill receive a box of Vishays 6400's this week - it will be nice to compare them as well...