A Seal RED LED for your Wolf Eyes Seal torch. This LED produces RED light only and allows you to take advantage of the large aspheric head of the Seal with RED light. A RED LED is a must better solution than a filter, most LEDs are blueish white so have little red to get through a red filter (a red filter does as it says, it  only allow red light throught the filter - unfortunately not much use if there isn't much red in the LED. Better used with incandescent globes which have red in them).

This Seal RED LED produces the bulk of it's output in the RED wavelength so a much better solution.