That isn't how polarization works. It isn't about the spectrum it is about how it travels or is reflected in a more uniform way (normally horizontal. So if you block out horizontal light you get rid of glare or in the case of panels you stop seeing the screen.
Right, well we aren't talking about polarization since LEDs don't emit polarized light, so you'd need notch filters to block the wavelengths LEDs emit, but the notch required to block all LEDs would be entire visible spectrum.
