Willie R. Meghar wrote:
This thread provides an opportunity to share your solutions with
others.

A Roscolux No. 120 gel sheet. Converts any white light source
(flashlights, computer screens, headlamps, car headlights) to
astro-friendly redlight. Next to bungie cords and heavy rubber bands,
one of the best jack knife type astronomy products. Available at local
theatrical supply stores for $6-$9. - Canopus56