[Joohoo]

howdy everyone, I have been thinking about all the talk about people hacking apart remotes, putting infrared LEDs in series and the like. Our team has a simple remote control for our transmitter and is using the FIRST supplied ir receiver. I was wondering that if I were to hack a few more infrared LEDs into the remote, what wavelength LED would I need to use?
I know it would have to be considered infrared but within, but does the ir receiver only recognize certain wavelengths of infrared emission? Does it really matter? Ive been looking at a bunch of LEDs with 940nm and some with 850nm wave lengths. Any help would be greatly appreciated.