This may sound silly, but I do not know the wavelength of the IR LEDs I’m using. The store I purchased them from are kinda hopeless, and even asking the voltage seemed to create a challenge. I could guess, but was wondering if there is a effective way of determining this.
I was thinking along the lines of incrementally layers floppy disk material over the camera, and perhaps the IR light will appear brighter with various layering setups. But I may be wrong (probably)