OC safe papers are blind to red plus a small portion of other parts of the spectrum.
Our eyes aren't very sensitive to red. Traditionally, this meant that we could see more in a darkroom with a relatively dim, amber OC safelight than with the equally relatively dim red safelights that were designed for orthochromatic materials.
But all of this was the state before modern, efficient LEDs came on the scene.
With the exception of the Heiland product linked to, none of the other LEDs that I have seen are designed for darkroom work. As a result, they aren't guaranteed to have the sort of narrow spectrum output that fits nicely into the right part of the paper. My sense is that it would be easy to design, manufacture and guarantee such darkroom LEDs, but it wouldn't be incredibly cheap to do so - spectrum accuracy comes at a price.
I have experimented with three different types of LED sources for safelight illumination.
One of them - a 16 foot red LED party rope light - works tremendously well as long as it is at least 3 feet away from the papers I use. I actually use it higher up - closer to my nine foot, beige painted ceiling. Its availability is better at Christmas time
Another of them - a somewhat old style array of 24 or so small red sources in a housing the size of a projection bulb, that screws into a standard household reflector - also works well. I have it installed in a clamp on lamp holder that is pointed to the ceiling.
I also used a third option - an amber LED with the same array of 24 or so small sources in a housing the size of a projection bulb. It used to work well pointed up to the ceiling, but we re-painted the bathroom/darkroom a lighter colour. Now it fogs the paper.
For clarity, when I say that a safelight works well, that means it passes the Kodak Safelight Test at all reasonable and some unreasonable lengths of time. As you are probably aware, the Kodak Safelight Test involves already partially fogged (and therefore much more sensitive) paper - both pre-safelight exposure fogged and post safelight exposure fogged. The partial fogging both increases the sensitivity of the test, and more accurately tests for the subtle, contrast sapping fog problems that aren't as easy to see as something like obviously grey borders.
Here is a link to the test.
Oh, and here is a web image that shows the white version of my older LED safelights - now discontinued:
