> It would likely work with wands that have to be manually swiped
> across the barcode, IF the LED color matched the wand's sensor.

Some have filters, some don't.

>  Red show work for many, however there are some wands that use IR

True, but not popular in retail.


> Non-contact scanners that use a linear CCD array would have no chance
> at all of reading anything from a single LED.

Yup, they need something they can image.


> The scanners (typically gun-shaped) that use a laser and rotating
> mirror fall somewhere in the middle - they could work, but it's also
> possible that they're doing something like synchronizing their
> decoding with the mirror rotation.

The receive optics usually are steered by the same mirror that sweeps
the transmit beam, so you'd have no way to get in the field of view
all the time.  Also they frequently have narrow filters on the rx
optics, but you might find an LED that gets you through that.
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