LEDs emit a limited number of wavelengths of light.

Incandescent lamps emit a broad spectrum of light.

Filters (colored lens) can knock out certain colors, allowing others to pass. Filters cannot add colors that aren't there to begin with.

You can't just filter a monochromatic light into another color. Filtering LEDs doesn't work as straightforwardly as your incandescent-based intuition would lead you to believe.